Mapping Between SAS Disk Enclosure Locations and Expansion Ports (OceanStor 18000 V5 Series)

Connecting 2 U SAS Disk Enclosures Only

• If the number of 2 U disk enclosures is a multiple of 16, the layout of a system bay and disk bays is shown in Figure C-1.
  Figure C-1 Bay layout and expansion port IDs
  

• If the number of 2 U disk enclosures is not a multiple of 16
  • Each loop contains up to two disk enclosures.

    Disk bays and system bays have the same disk enclosure layout principles. The following uses system bay 0 as an example.

    Allocate disk enclosures to loops 0 to 7 in the sequence of DAE000 > DAE010 >...> DAE060 > DAE070 > DAE001 > DAE011 >...> DAE061 > DAE071.

  • Each loop contains up to four disk enclosures.

    Install level-1 and level-2 disk enclosures in the same bay, and the level-3 and level-4 disk enclosures in the same bay.

    • Allocate level-1 and level-2 disk enclosures to loops 0 to 7 in system bay 0 in the sequence of DAE000 > DAE010 >...> DAE060 > DAE070 > DAE001 > DAE011 >...> DAE061 > DAE071.
    • Allocate level-3 and level-4 disk enclosures to loops 0 to 7 in disk bay 0_2 in the sequence of DAE002 > DAE012 >...> DAE062 > DAE072 > DAE003 > DAE013 >...> DAE063 > DAE073.

Connecting 4 U SAS Disk Enclosures Only

• If the number of 4 U disk enclosures is a multiple of 8, the layout of system bay 0 and disk bays is shown in Figure C-2.
  Figure C-2 Bay layout and expansion port IDs
  

• If the number of 4 U disk enclosures is not a multiple of 8
  • Each loop contains up to two disk enclosures.

    Disk bays and system bays have the same disk enclosure layout principles. The following uses system bay 0 as an example.

    Allocate disk enclosures to loops 0 to 7 in the sequence of DAE000 > DAE010 >...> DAE060 > DAE070.

  • Each loop contains up to four disk enclosures.

    Install level-1 disk enclosures in the same bay and level-2 disk enclosures in the same bay. Disk bays and system bays have the same disk enclosure layout principles. The following uses system bay 0 and disk bay 0_2 as an example.

    • Allocate level-1 disk enclosures to loops 0 to 7 in system bay 0 in the sequence of DAE000 > DAE010 >...> DAE060 > DAE070.
    • Allocate level-2 disk enclosures to loops 0 to 7 in disk bay 0_2 in the sequence of DAE001 > DAE011 >...> DAE061 > DAE071.

Connecting Both 2 U SAS and 4 U SAS Disk Enclosures (up to Two Disk Enclosures in a Loop)

When the maximum number of cascaded disk enclosures in a loop is two, a loop contains up to two 2 U SAS disk enclosures or one 4 U SAS disk enclosure.

A bay can be fully loaded with 16 x 2 U disk enclosures or 8 x 4 U disk enclosures. When 2 U and 4 U disk enclosures are installed in one bay, lay out 2 U disk enclosures in the lower half of the bay and 4 U disk enclosures in the upper half.

Figure C-3 Bay layout and expansion port IDs

• If the number of 2 U disk enclosures is a multiple of 16 and that of 4 U disk enclosures is a multiple of 8

  Install 2 U and 4 U disk enclosures in different bays. The layout principles are the same as those in connecting only 2 U SAS disk enclosures or 4 U disk enclosures.

• If the number of 2 U disk enclosures is not a multiple of 16 or the number of 4 U disk enclosures is not a multiple of 8

  The number of remaining 2 U disk enclosures is H (H is the remainder when the total number of 2 U disk enclosures is divided by 16) and that of remaining 4 U disk enclosures is K (K is the remainder when the total number of 4 U disk enclosures is divided by 8). Disk bays and system bays have the same disk enclosure layout principles. The following uses system bay 0 and disk bay 0_0 as an example.

  • If H is greater than 8 and K is greater than 1, two bays are required. 2 U disk enclosures are preferentially installed in a system bay.
    • Method for laying out 2 U disk enclosures:

      □ For the lower half of system bay 0, allocate eight disk enclosures to loops 0 to 3 in the sequence of DAE000 > DAE010 > DAE020 > DAE030 > DAE001 > DAE011 > DAE021 > DAE031.

      □ For the upper half of system bay 0, allocate one disk enclosure to each of loops 4 to 7 in the sequence of DAE040 > DAE050 > DAE060 > DAE070 > DAE041 > DAE051 > DAE061 > DAE071.

    • Method for allocating 4 U disk enclosures:

      □ The number of remaining 4 U disk enclosures is less than or equal to 4.

      For the lower half of disk bay 0_0, allocate one disk enclosure to each of loops 0 to 3 in the sequence of DAE000 > DAE010 > DAE020 > DAE030.

      □ The number of remaining 4 U disk enclosures is greater than 4.

      For the lower half of disk bay 0_0, allocate four disk enclosures to loops 0 to 3 in the sequence of DAE000 > DAE010 > DAE020 > DAE030.

      For the upper half of disk bay 0_0, allocate one disk enclosure to each of loops 4 to 7 in the sequence of DAE040 > DAE050 > DAE060 > DAE070.

  • If H is less than or equal to 8 and K is greater than 4, two bays are required. 2 U disk enclosures are preferentially installed in a system bay.
    • Method for laying out 2 U disk enclosures:

      For the lower half of system bay 0, allocate one disk enclosure to each of loops 0 to 3 in the sequence of DAE000 > DAE010 > DAE020 > DAE030 > DAE001 > DAE011 > DAE021 > DAE031.

    • Method for allocating 4 U disk enclosures:

      □ For the upper half of system bay 0, allocate one disk enclosure to each of loops 4 to 7 in the sequence of DAE040 > DAE050 > DAE060 > DAE070.

      □ For disk bay 0_0, follow the layout principle of installing 4 U disk enclosures only.

  • If H is less than or equal to 8 and K is less than 4, one bay is required.
    • Method for laying out 2 U disk enclosures:

      For the lower half of system bay 0, allocate one disk enclosure to each of loops 0 to 3 in the sequence of DAE000 > DAE010 > DAE020 > DAE030 > DAE001 > DAE011 > DAE021 > DAE031.

    • Method for allocating 4 U disk enclosures:

      For the upper half of system bay 0, allocate one disk enclosure to each of loops 4 to 7 in the sequence of DAE040 > DAE050 > DAE060 > DAE070.

Connecting Both 2 U SAS and 4 U SAS Disk Enclosures (up to Four Disk Enclosures in a Loop)

When the maximum number of cascaded disk enclosures in a loop is four, a loop contains up to four 2 U SAS disk enclosures or two 4 U SAS disk enclosures.

A bay can be fully loaded with 16 x 2 U disk enclosures or 8 x 4 U disk enclosures. When 2 U and 4 U disk enclosures are installed in one bay, lay out 2 U disk enclosures in the lower half of the bay and 4 U disk enclosures in the upper half. In addition, install level-1 and level-2 2 U disk enclosures in the same bay, level-3 and level-4 2 U disk enclosures in the same bay, level-1 4 U disk enclosures in the same bay, and level-2 4 U disk enclosures in the same bay.

Figure C-4 Bay layout and expansion port IDs

• If the number of 2 U disk enclosures is a multiple of 32 and that of 4 U disk enclosures is a multiple of 16

  2 U and 4 U disk enclosures are installed in different bays. The layout principles are the same as those in connecting only 2 U SAS disk enclosures or 4 U disk enclosures.

• If the number of 2 U disk enclosures is not a multiple of 32 or that of 4 U disk enclosures is not a multiple of 16

  The number of remaining 2 U disk enclosures is H (H is the remainder when the total number of 2 U disk enclosures is divided by 32) and that of remaining 4 U disk enclosures is K (K is the remainder when the total number of 4 U disk enclosures is divided by 16). Disk bays and system bays have the same disk enclosure layout principles. The following uses system bay 0, disk bay 0_0, disk bay 0_2, and disk bay 0_3 as an example.

  • If H is greater than 16 and K is greater than 1, four bays are required. 2 U disk enclosures are preferentially installed in a system bay.
    • Method for laying out 2 U disk enclosures:

      □ For the lower half of system bay 0 and disk bay 0_2, allocate level-1 and level-2 disk enclosures to loops 0 to 3 in system bay 0 and level-3 and level-4 disk enclosures to loops 0 to 3 in disk bay 0_2 in the following sequence: DAE000 > DAE010 > DAE020 > DAE030 > DAE001 > DAE011 > DAE021 > DAE031 > DAE002 > DAE012 > DAE022 > DAE032 > DAE003 > DAE013 > DAE023 > DAE033.

      □ For the upper half of system bay 0 and disk bay 0_2, allocate level-1 and level-2 disk enclosures to loops 4 to 7 in system bay 0 and level-3 and level-4 disk enclosures to loops 4 to 7 in disk bay 0_2 in the following sequence: DAE040 > DAE050 > DAE060 > DAE070 > DAE041 > DAE051 > DAE061 > DAE071 > DAE042 > DAE052 > DAE062 > DAE072 > DAE043 > DAE053 > DAE063 > DAE073.

    • Method for allocating 4 U disk enclosures:

      □ The number of remaining 4 U disk enclosures is less than or equal to 8.

      For the lower half of disk bay 0_0 and disk bay 0_3, allocate level-1 disk enclosures to loops 8 to 11 in disk bay 0_0 and level-2 disk enclosures to loops 8 to 11 in disk bay 0_3 in the following sequence: DAE080 > DAE090 > DAE0A0 > DAE0B0 > DAE081 > DAE091 > DAE0A1 > DAE0B1.

      □ The number of remaining 4 U disk enclosures is greater than 8.

      For the lower half of disk bay 0_0 and disk bay 0_3, allocate level-1 disk enclosures to loops 8 to 11 in disk bay 0_0 and level-2 disk enclosures to loops 8 to 11 in disk bay 0_3 in the following sequence: DAE080 > DAE090 > DAE0A0 > DAE0B0 > DAE081 > DAE091 > DAE0A1 > DAE0B1.

      For the upper half of disk bay 0_0 and disk bay 0_3, allocate level-1 disk enclosures to loops 12 to 15 in disk bay 0_0 and level-2 disk enclosures to loops 12 to 15 in disk bay 0_3 in the following sequence: DAE0C0 > DAE0D0 > DAE0E0 > DAE0F0 > DAE0C1 > DAE0D1 > DAE0E1 > DAE0F1.

  • If H is less than or equal to 16 and K is greater than 8, four bays are required. 2 U disk enclosures are preferentially installed in a system bay.
    • Method for laying out 2 U disk enclosures:

      For the lower half of system bay 0 and disk bay 0_2, allocate level-1 and level-2 disk enclosures to loops 0 to 3 in system bay 0 and level-3 and level-4 disk enclosures to loops 0 to 3 in disk bay 0_2 in the following sequence: DAE000 > DAE010 > DAE020 > DAE030 > DAE001 > DAE011 > DAE021 > DAE031 > DAE002 > DAE012 > DAE022 > DAE032 > DAE003 > DAE013 > DAE023 > DAE033.

    • Method for allocating 4 U disk enclosures:

      □ For the upper half of system bay 0 and disk bay 0_2, allocate level-1 disk enclosures to loops 4 to 7 in system bay 0 and level-2 disk enclosures to loops 4 to 7 in disk bay 0_2 in the following sequence: DAE040 > DAE050 > DAE060 > DAE070 > DAE041 > DAE051 > DAE061 > DAE071.

      □ For disk bays 0_0 and 0_3, follow the layout principle of installing 4 U disk enclosures only.

  • If H is less than or equal to 16 and K is smaller than 8, two bays are required.
    • Method for laying out 2 U disk enclosures:

      For the lower half of system bay 0 and disk bay 0_2, allocate level-1 and level-2 disk enclosures to loops 0 to 3 in system bay 0 and level-3 and level-4 disk enclosures to loops 0 to 3 in disk bay 0_2 in the following sequence: DAE000 > DAE010 > DAE020 > DAE030 > DAE001 > DAE011 > DAE021 > DAE031 > DAE002 > DAE012 > DAE022 > DAE032 > DAE003 > DAE013 > DAE023 > DAE033.

    • Method for allocating 4 U disk enclosures:

      For the upper half of system bay 0 and disk bay 0_2, allocate level-1 disk enclosures to loops 4 to 7 in system bay 0 and level-2 disk enclosures to loops 4 to 7 in disk bay 0_2 in the following sequence: DAE040 > DAE050 > DAE060 > DAE070 > DAE041 > DAE051 > DAE061 > DAE071.