Determining whether new and existing racks are compatible

Procedure

  1. Determine the model of Rack-1 and the expansion rack being installed. The model number is on the machine type and model serial number (MTMS) label. The MTMS label  1  is on the front cover above the door latch release. See Figure 1.
    Figure 1. Rack serial number and rack number labels (Models 98x, 8xE)
    Note: Rack-4 and Rack-5 not shown. Some models do not use a Rack-3.
    Rack serial number and rack number labels (Models 98x)
  2. Use the following table to find the condition that applies.
    Table 1. Type and model of Rack-1 and expansion rack to install
    Type and model of Rack-1 Type and model of expansion rack to install Action
    283x-984 283x-84E Continue to step 3.
    283x-984 Other than 283x-84E Stop the installation. See Note 1.
    283x-985 283x-85E Continue to step 3.
    533x-985 533x-85E Continue to step 3.
    283x-985 or 533x-985 Other than 283x-85E or 533x-85E Stop the installation. See Note 1.
    283x-986 283x-86E Continue to step 3.
    533x-986 533x-86E Continue to step 3.
    283x-986 or 533x-986 Other than 283x-86E or 533x-86E Stop the installation. See Note 1.
    533x-988 533x-88E Continue to step 3.
    533x-988 Other than 533x-88E Stop the installation. See Note 1.
    Other than:
    283x-984, 283x-985, 283x-986
    533x-985, 533x-986, 533x-988
    		 Any Stop the installation. See Note 1.
    Note 1: These instructions can be used to install a model 84E, 85E, 86E, or 88E expansion rack to a model 984, 985, 986 or 988 storage facility with the same machine type. Refer to the correct expansion rack installation instructions for your model, or contact your next level of support.
  3. In the expansion rack you are installing, observe the Rack number label  2 . See Figure 1.
    Note: The Rack number label defines the rack position for this rack in the storage facility. The intra-rack cables and cable destination labels for each rack position are unique. The expansion rack must be installed in the correct position.
    • For model 84E Rack-2, go to step 4.
    • For model 85E or 86E Rack-2, go to step 5.
    • For model 88E Rack-2, go to step 6.
    • For Rack-3, Rack-4, or Rack-5, go to step 7.
  4. You are installing model 84E Rack-2. At the rear of Rack-1, observe the P1-C6 slots in both CEC enclosures.

    Do both CEC enclosures have a PCIe two-port card in slot P1-C6?

    • Yes, go to step 8.
    • No, stop the installation. Call the next level of support. Rack-1 does not have the feature installed to support expansion racks.
    Figure 2. CEC enclosure location codes (rear view) (Models 980 and 984)
    CEC enclosure location codes (rear view)
  5. You are installing model 85E or 86E Rack-2. At the rear of Rack-1, observe the P1-C3 and P1-C5 slots in both CEC enclosures.

    Do both CEC enclosures have a PCIe two-port card in slots P1-C3 and P1-C5?

    • Yes, go to step 8.
    • No, stop the installation. Call the next level of support. Rack-1 does not have the feature installed to support expansion racks.
    Figure 3. CEC enclosure location codes (rear view) (Models 981, 985, and 986)
    CEC enclosure location codes (rear view)
  6. You are installing model 88E Rack-2. At the rear of Rack-1, observe the P1-C2 and P1-C3 slots in both CEC enclosures.
    Do both CEC enclosures have a PCIe two-port card in slots P1-C2 and P1-C3?
    • Yes, go to step 8.
    • No, stop the installation. Call the next level of support. Rack-1 does not have the feature installed to support expansion racks.
    Figure 4. CEC enclosure location codes (rear view) (Models 982, 988)
    CEC enclosure location codes (rear view) (Model 982)
  7. Does the expansion rack that you are installing (Rack-3, Rack-4, or Rack-5) have I/O enclosures near the bottom of the rack?
    • No, go to the next step.
    • Yes, stop the installation. Only Rack-1 and Rack-2 can have I/O enclosures. Contact your next level of support.
  8. Find the expansion rack that you are installing in the following list:
    • Model 84E Rack-2 or Rack-3, go to step 18.
    • Model 85E Rack-2 (single-phase), go to step 10.
    • Model 85E Rack-3 (single-phase), go to step 11.
    • Model 85E Rack-4 (single-phase), go to step 12.
    • Model 85E Rack-5 (single-phase), go to step 13.
    • Model 86E Rack-2 (three-phase), go to step 14.
    • Model 86E Rack-3 (three-phase), go to step 15.
    • Model 86E Rack-4 (three-phase), go to step 16.
    • Model 86E Rack-5 (three-phase), go to step 17.
    • Model 85E (all-flash) Rack-2 or model 86E (all-flash) Rack-2, no additional checks are necessary. Continue with Inspecting for shipping damage.
    • Model 88E Rack-2 or Rack-3,go to step 9.
  9. Observe the rear of the Model 88E expansion rack you are installing (Rack-2 or Rack-3). Note which high-performance flash enclosures are present. Use Table 2, Figure 5, and Figure 6 to determine whether the required device adapter card, SAS (flash) pairs are present or available to install.
    Note:

    The required adapter card pairs can be installed at the same time as the high-performance flash enclosures.

    Table 2. Determining whether Rack-1 and Rack-2 contain the necessary DA card, SAS (flash) pairs to support Rack-2 or Rack-3 (Model 88E) high-performance flash enclosures
    If the new expansion rack has a high-performance flash enclosure in location: (see Figure 5) A DA card, SAS (flash) pair must be present or available for installation in Rack-1 I/O enclosure locations: (see Figure 5) A DA card, SAS (flash) pair must be present or available for installation in Rack-2 I/O enclosure locations: (see Figure 5)
    Rack-2: R2-F02

    R1-XI1 Slot C3

    R1-XI2 Slot C6

    (DA pair 8)

    		 Not applicable
    Rack-2: R2-F04

    R1-XI3 Slot C3

    R1-XI4 Slot C6

    (DA pair 10)

    		 Not applicable
    Rack-2: Any number of high-performance flash enclosures in locations R2-F05 through R2-F12. No additional interfaces required No additional interfaces required
    Rack-3: R3-F02 Not applicable

    R2-XI1 Slot C6

    R2-XI2 Slot C3

    (DA pair 13)
    Rack-3: R3-F04 Not applicable

    R2-XI3 Slot C6

    R2-XI4 Slot C3

    (DA pair 15)
    Rack-3: R3-F06 Not applicable

    R2-XI1 Slot C3

    R2-XI2 Slot C6

    (DA pair 12)
    Rack-3: R3-F08 Not applicable

    R2-XI3 Slot C3

    R2-XI4 Slot C6

    (DA pair 14)
    Rack-3: R3-F10

    R1-XI1 Slot C6

    R1-XI2 Slot C3

    (DA pair 9)

    		 Not applicable
    Rack-3: R3-F12

    R1-XI3 Slot C6

    R1-XI4 Slot C3

    (DA pair 11)

    		 Not applicable
    Are the required adapter card pairs present or available for installation?
    • Yes, continue with Inspecting for shipping damage.
    • No, stop the installation. To install the affected high-performance flash enclosures, the necessary device adapter card, SAS (flash) pairs must be installed or available for install at the same time as the enclosures. It is possible to continue the installation without these parts, but you will not be able to install the affected high-performance flash enclosures. Work with your customer and next level of support to decide how to proceed. If the decision is to proceed, continue with Inspecting for shipping damage.
    Figure 5. Rack 1-3 storage enclosure and I/O enclosure location codes (Models 988, 88E all-flash) (rear view)
    Rack 1-3 storage enclosure and I/O enclosure location codes (Models 988, 88E all-flash) (rear view)
    Figure 6. I/O enclosure locations (rear) (models 98x, 8xE)
    I/O enclosure locations (rear) (models 98x, 8xE)
  10. Observe the rear of Rack-2 (Model 85E). Note which storage enclosures are present in locations R2-G01 through R2-G10. Use Table 3, Figure 7, and Figure 8 to determine whether the Rack-2 has enough DA cards installed.
    Note: A complete diagram of device adapter pair IDs for storage enclosures is included at the end of this section. See Figure 9 and Figure 10.
    Table 3. Determining whether Rack-2 (Model 85E) contains the necessary DA card pairs to support Rack-2 storage enclosures
    If the rear of Rack-2 has a storage enclosure in location:
    (See Figure 7)    		 The rear of Rack-2 must have a DA card pair in I/O enclosure locations:
    (See Figure 7)
    R2-G03
    R2-XI3 Slot C3
    R2-XI4 Slot C6
    (DA pair 6)
    R2-G05
    R2-XI1 Slot C6
    R2-XI2 Slot C3
    (DA pair 5)  
    R2-G07
    R2-XI3 Slot C6
    R2-XI4 Slot C3
    (DA pair 7)
    R2-G09
    R2-XI1 Slot C3
    R2-XI2 Slot C6
    (DA pair 4)
    Zero storage enclosures in locations R2-G01 through R2-G10
    No DA card pairs required in Rack-2
    Does Rack-2 have the necessary DA cards?
    • Yes, continue with Inspecting for shipping damage.
    • No, stop the installation. To install the existing storage enclosures in Rack-2, you must first install the MESs to add the necessary DA cards. It is possible to continue the installation without installing the MESs, but you will not be able to install the affected Rack-2 storage enclosures. Work with your customer and next level of support to decide how to proceed. If the decision is to proceed, continue with Inspecting for shipping damage.
    Figure 7. Rack 1-5 storage enclosure and I/O enclosure location codes (single-phase Models 985, 85E) (rear view)
    Note: High-performance flash enclosures are in Rack-1 and Rack-2.
    Rack 1-5 storage enclosure and I/O enclosure location codes (single-phase Models 985, 85E) (rear view)
    Figure 8. Location codes for device adapter and host adapter cards
    Location codes for device adapter and host adapter cards
  11. You are installing Rack-3 (Model 85E).
    1. Observe the rear of Rack-1, Rack-2, and Rack-3. Use Table 4, Figure 7, Figure 8 to determine whether Rack-1 and Rack-2 have the correct DA card pairs to connect the FC-AL cables from Rack-3 storage enclosures.
    2. Observe the front of Rack-1, Rack-2, and Rack-3. Use Table 5 and Figure 7 to determine whether Rack-1 and Rack-2 have the specific storage enclosures to connect the FC-AL cables from Rack-3 storage enclosures.
    Table 4. Determining whether Rack-1 and Rack-2 contain the necessary DA card pairs to support Rack-3 (Model 85E) storage enclosures
    If Rack-3 has a storage enclosure in location:
    (see Figure 7)    		 The rear of Rack-1 must have a DA card pair in I/O enclosure locations:
    (see Figure 7)    		 The rear of Rack-2 must have a DA card pair in I/O enclosure locations::
    (see Figure 7)
    R3-G18
    R1-XI3 Slot C3
    R1-XI4 Slot C6
    (DA pair 2)
    		 Not applicable
    Table 5. Determining whether Rack-3 (Model 85E) storage enclosures can be cabled to Rack-1 and Rack-2 storage enclosures
    If the front of Rack-3 has a storage enclosure in location:
    (see Figure 7)    		 The front of Rack-1 must have a storage enclosure in location:
    (see Figure 7)    		 The front of Rack-2 must have a storage enclosure in location:
    (see Figure 7)
    R3-G08 Not applicable R2-G06
    R3-G10 Not applicable R2-G08
    R3-G12 R1-G02 Not applicable
    R3-G14 R1-G04 Not applicable
    R3-G16 R1-G06 Not applicable
    R3-G18 To I/O enclosure, see Table 4 Not applicable

    Do Rack-1 and Rack-2 have the necessary storage enclosures and DA card pairs to install Rack-3?

    • Yes, continue with Inspecting for shipping damage.
    • No, stop the installation. To install all storage enclosures in Rack-3, you must install the MESs to add the necessary DA card pairs or storage enclosures to Rack-1, or Rack-2, or both. It is possible to continue the installation without installing the MESs but you will not be able to install all the Rack-3 storage enclosures. Work with your customer and next level of support to decide how to proceed. If the decision is to proceed, continue with Inspecting for shipping damage.
  12. You are installing Rack-4 (Model 85E). Observe the front of Rack-2 and Rack-3. Use Table 6 and Figure 7 to determine whether Rack-2 and Rack-3 have the specific storage enclosures to connect the FC-AL cables from Rack-4 storage enclosures.
    Table 6. Determining whether Rack-4 (Model 85E) storage enclosures can be cabled to Rack-2 and Rack-3 storage enclosures
    If the front of Rack-4 has a storage enclosure in location:
    (see Figure 7)    		 The front of Rack-2 must have a storage enclosure in location:
    (see Figure 7)    		 The front of Rack-3 must have a storage enclosure in location:
    (see Figure 7)
    R4-G04 Not applicable R3-G02
    R4-G06 Not applicable R3-G04
    R4-G08 Not applicable R3-G06
    R4-G10 Not applicable R3-G08
    R4-G12 Not applicable R3-G10
    R4-G14 R2-G02 Not applicable
    R4-G16 R2-G04 Not applicable
    R4-G18 Not applicable R3-G12

    Do Rack-2 and Rack-3 have the necessary storage enclosures to install Rack-4?

    • Yes, continue with Inspecting for shipping damage.
    • No, stop the installation. To install all storage enclosures in Rack-4, you must install the MESs to add the necessary storage enclosures to Rack-2 and Rack-3. It is possible to continue the installation without installing the MESs but you will not be able to install all the Rack-4 storage enclosures. Work with your customer and next level of support to decide how to proceed. If the decision is to proceed, continue with Inspecting for shipping damage.
  13. You are installing Rack-5 (Model 85E). Observe the front of Rack-4. Use Table 7 and Figure 7 to determine whether Rack-4 has the specific storage enclosures to connect the FC-AL cables from Rack-5 storage enclosures.
    Table 7. Determining whether Rack-5 (Model 85E) storage enclosures can be cabled to Rack-4 storage enclosures
    If the front of Rack-5 has a storage enclosure in location:
    (see Figure 7)    		 The front of Rack-4 must have a storage enclosure in location:
    (see Figure 7)
    R5-G10 R4-G08
    R5-G12 R4-G10
    R5-G14 R4-G12
    R5-G16 R4-G14
    R5-G18 R4-G16
    Does Rack-4 have the necessary storage enclosures to install Rack-5?
    • Yes, continue with Inspecting for shipping damage.
    • No, stop the installation. To install all storage enclosures in Rack-5, you must install the MESs to add the necessary storage enclosures to Rack-4. It is possible to continue the installation without installing the MESs but you will not be able to install all the Rack-5 storage enclosures. Work with your customer and next level of support to decide how to proceed. If the decision is to proceed, continue with Inspecting for shipping damage.
    Figure 9. Device adapter pair IDs for storage enclosures (Models 985, 85E single-phase power) (rear view, racks 1 and 2)
    Device adapter pair IDs for storage enclosures (Models 985, 85E single-phase power) (rear view, racks 1 and 2)
    Figure 10. Device adapter pair IDs for storage enclosures (Models 985, 85E single-phase power) (rear view, racks 3, 4, 5)
    Device adapter pair IDs for storage enclosures (Models 985, 85E single-phase power) (rear view, racks 3, 4, 5)
  14. Observe the rear of Rack-1 (Model 986) and Rack-2 (Model 86E). Note which storage enclosures are present in locations R2-G01 through R2-G08. Use Table 8, Figure 11, and Figure 12 to determine whether Rack-1 and Rack-2 have enough DA cards installed.
    Note: A complete diagram of device adapter pair IDs for storage enclosures has been included at the end of this section. See Figure 13 and Figure 14.
    Table 8. Determining whether Rack-1 and Rack-2 (three-phase) contain the necessary DA card pairs to support Rack-2 storage enclosures
    If the rear of Rack-2 has a storage enclosure in location:
    (See Figure 11)    		 The rear of Rack-1 must have a DA card pair in I/O enclosure locations:
    (See Figure 11)    		 The rear of Rack-2 must have a DA card pair in I/O enclosure locations:
    (See Figure 11)
    R2-G01 R1-XI1 Slot C6
    R1-XI2 Slot C3
    (DA pair 1)      		 Not applicable
    R2-G03 Not applicable R2-XI1 Slot C6
    R2-XI2 Slot C3
    (DA pair 5)  
    R2-G05 Not applicable R2-XI3 Slot C6
    R2-XI4 Slot C3
    (DA pair 7)
    R2-G07 Not applicable R2-XI1 Slot C3
    R2-XI2 Slot C6
    (DA pair 4)
    Zero storage enclosures in locations R2-G01 through R2-G08 Not applicable No DA card pairs required in Rack-2
    Do Rack-1 and Rack-2 have the necessary DA cards?
    • Yes, continue with Inspecting for shipping damage.
    • No, stop the installation. To install the existing storage enclosures in Rack-2, you must first install the MESs to add the necessary DA cards. It is possible to continue the installation without installing the MESs, but you will not be able to install the affected Rack-2 storage enclosures. Work with your customer and next level of support to decide how to proceed. If the decision is to proceed, continue with Inspecting for shipping damage.
    Figure 11. Rack 1-5 storage enclosure and I/O enclosure location codes (three-phase Models 986, 86E) (rear view)
    Note: High-performance flash enclosures are in Rack-1 and Rack-2.
    Rack 1-5 storage enclosure and I/O enclosure location codes (three-phase Models 986, 86E) (rear view)
    Figure 12. Location codes for device adapter and host adapter cards
    Location codes for device adapter and host adapter cards
  15. You are installing Rack-3 (Model 86E).
    1. Observe the rear of Rack-1, Rack-2, and Rack-3. Use Table 9, Figure 11, and Figure 12 to determine whether Rack-1 and Rack-2 have the correct DA card pairs to connect the FC-AL cables from Rack-3 storage enclosures.
    2. Observe the front of Rack-1, Rack-2, and Rack-3. Use Table 10 and Figure 11 to determine whether Rack-1 and Rack-2 have the specific storage enclosures to connect the FC-AL cables from Rack-3 storage enclosures.
    Table 9. Determining whether Rack-1 and Rack-2 contain the necessary DA card pairs to support Rack-3 (Model 86E) storage enclosures
    If Rack-3 has a storage enclosure in location:
    (See Figure 11)    		 The rear of Rack-1 must have a DA card pair in I/O enclosure locations:
    (See Figure 11)    		 The rear of Rack-2 must have a DA card pair in I/O enclosure locations:
    (See Figure 11)
    R3-G08 Not applicable 
    R2-XI3 Slot C3
    R2-XI4 Slot C6
    (DA pair 6)
    R3-G16
    R1-XI3 Slot C3
    R1-XI4 Slot C6
    (DA pair 2)
    		 Not applicable
    Table 10. Determining whether Rack-3 (Model 86E) storage enclosures can be cabled to Rack-1 and Rack-2 storage enclosures
    If the front of Rack-3 has a storage enclosure in location:
    (See Figure 11)    		 The front of Rack-1 must have a storage enclosure in location:
    (See Figure 11)    		 The front of Rack-2 must have a storage enclosure in location:
    (See Figure 11)
    R3-G02 Not applicable  R2-G04
    R3-G04 Not applicable R2-G06
    R3-G06 Not applicable R2-G08
    R3-G08 Not applicable To I/O enclosure, see Table 9
    R3-G10 Not applicable R2-G02
    R3-G12 R1-G02 Not applicable
    R3-G14 R1-G04 Not applicable
    R3-G16 To I/O enclosure, see Table 9 Not applicable
    Do Rack-1 and Rack-2 have the necessary storage enclosures and DA card pairs to install Rack-3?
    • Yes, continue with Inspecting for shipping damage.
    • No, stop the installation. To install all storage enclosures in Rack-3, you must install the MESs to add the necessary DA card pairs or storage enclosures to Rack-1, or Rack-2, or both. It is possible to continue the installation without installing the MESs but you will not be able to install all the Rack-3 storage enclosures. Work with your customer and next level of support to decide how to proceed. If the decision is to proceed, continue with Inspecting for shipping damage.
  16. You are installing Rack-4 (Model 86E). Observe the front of Rack-3. Use Table 11 and Figure 11 to determine whether Rack-3 has the specific storage enclosures to connect the FC-AL cables from Rack-4 storage enclosures.
    Table 11. Determining whether Rack-4 (Model 86E) storage enclosures can be cabled to Rack-3 storage enclosures
    If the front of Rack-4 has a storage enclosure in location:
    (See Figure 11)    		 The front of Rack-3 must have a storage enclosure in location:
    (See Figure 11)
    R4-G02 R3-G02
    R4-G04 R3-G04
    R4-G06 R3-G06
    R4-G08 R3-G08
    R4-G10 R3-G10
    R4-G12 R3-G12
    R4-G14 R3-G14
    R4-G16 R3-G16
    Does Rack-3 have the necessary storage enclosures to install Rack-4?
    • Yes, continue with Inspecting for shipping damage.
    • No, stop the installation. To install all storage enclosures in Rack-4, you must install the MESs to add the necessary storage enclosures to Rack-3. It is possible to continue the installation without installing the MESs but you will not be able to install all the Rack-4 storage enclosures. Work with your customer and next level of support to decide how to proceed. If the decision is to proceed, continue with Inspecting for shipping damage.
  17. You are installing Rack-5 (Model 86E). Observe the front of Rack-4. Use Table 12 and Figure 11 to determine whether Rack-4 has the specific storage enclosures to connect the FC-AL cables from Rack-5 storage enclosures.
    Table 12. Determining whether Rack-5 (Model 86E) storage enclosures can be cabled to Rack-4 storage enclosures
    If the front of Rack-5 has a storage enclosure in location:
    (See Figure 11)    		 The front of Rack-4 must have a storage enclosure in location:
    (See Figure 11)
    R5-G02 R4-G02
    R5-G04 R4-G04
    R5-G06 R4-G06
    R5-G08 R4-G08
    R5-G10 R4-G10
    R5-G12 R4-G12
    R5-G14 R4-G14
    R5-G16 R4-G16
    Does Rack-4 have the necessary storage enclosures to install Rack-5?
    • Yes, continue with Inspecting for shipping damage.
    • No, stop the installation. To install all storage enclosures in Rack-5, you must install the MESs to add the necessary storage enclosures to Rack-4. It is possible to continue the installation without installing the MESs but you will not be able to install all the Rack-5 storage enclosures. Work with your customer and next level of support to decide how to proceed. If the decision is to proceed, continue with Inspecting for shipping damage.
    Figure 13. Device adapter pair IDs for storage enclosures (Models 986, 86E three-phase power) (rear view, racks 1 and 2)
    Device adapter pair IDs for storage enclosures (Models 986, 86E three-phase power) (rear view, racks 1 and 2)
    Figure 14. Device adapter pair IDs for storage enclosures (Models 986, 86E three-phase power) (rear view, racks 3, 4, 5)
    Device adapter pair IDs for storage enclosures (Models 986, 86E three-phase power) (rear view, racks 3, 4, 5)

Attention: The remaining steps in this section only apply to model 84E expansion racks.

  1. Determine whether the existing racks have the correct storage enclosures and DA cards to support the new rack. Refer to Table 13, Figure 15, and Figure 16.
    Note: A complete diagram of device adapter pair IDs for storage enclosures is included at the end of this section. See Figure 17.
    Table 13. Business class: DA card pairs and corresponding storage enclosures for new expansion rack storage enclosures
    If new expansion rack has a storage enclosure in location: Existing rack must have a storage enclosure in location: Rack-1 must have a DA card pair in I/O enclosure locations: Rack-2 must have a DA card pair in I/O enclosure locations:
    (see Figure 15) (see Figure 16)
    R2-G02 --- --- R2-XI3 Slot C3
    R2-XI4 Slot C6
    (DA pair 6)
    R2-G10 ---
    R1-XI3 Slot C6
    R1-XI4 Slot C3
    (DA pair 3)
    		 ---
    zero storage enclosures in Rack-2 locations R2-G01 through R2-G10 --- --- -
    R3-G10 --- ---
    R2-XI3 Slot C6
    R2-XI4 Slot C3
    (DA pair 7)
    R3-G16 R2-G02 --- -
    Do the existing racks have the necessary storage enclosures and DA cards as shown in Table 13?
    • Yes, continue with Inspecting for shipping damage.
    • No, stop the installation. To install all storage enclosures in the new rack, you must use an MES procedure to add the necessary storage enclosures and DA cards to the existing racks. It is possible to continue the installation without completing the MES installation procedure, but you will not be able to install all the storage enclosures in the new rack. Work with your customer and next level of support to decide how to proceed. If the decision is to proceed, continue with Inspecting for shipping damage.
    Figure 15. Rack 1-3 storage enclosure and I/O enclosure location codes (Models 984, 84E) (rear view)
    Note: High-performance flash enclosures are in Rack-1 and Rack-2.
    Rack 1-3 storage enclosure and I/O enclosure location codes (Models 984, 84E) (rear view)
    Figure 16. Location codes for device adapter and host adapter cards
    Location codes for device adapter and host adapter cards
    Figure 17. Device adapter pair IDs for storage enclosures (Models 984, 84E) (rear view, racks 1, 2, 3)
    Device adapter pair IDs for storage enclosures (Models 984, 84E) (rear view, racks 1, 2, 3)