Planning of Device Layout in a Bay (Applicable to 18000 Series)

Background Information

2 U SAS Disk Enclosures Only

If only 2 U SAS disk enclosures are configured, a maximum of sixteen 2 U SAS disk enclosures are required for a bay in full configuration.

• If the number of 2 U SAS disk enclosures is a multiple of 16, the configuration of 2 U SAS disk enclosures and expansion ports is shown in Figure 7-7.
  Figure 7-7 Configuration of 2 U SAS disk enclosures and expansion ports
  

  The green, orange, yellow, and pink areas indicate the level-1, level-2, level-3, and level-4 disk enclosures respectively (that is, first, second, third, and fourth disk enclosures in a loop). On the right of a disk enclosure ID is the port ID of the controller enclosure connecting to the disk enclosure. For example, DAE000 indicates the level-1 disk enclosure connecting to port P0 in slot 6 of controller enclosure 0, and DAE001 indicates the level-2 disk enclosure connecting to port P0 in slot 6 of controller enclosure 0.

• 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 use the same disk enclosure layout. 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 install 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.

4 U SAS Disk Enclosures Only

If only 4 U SAS disk enclosures are configured, a maximum of eight 4 U SAS disk enclosures are required for a bay in full configuration.

• If the number of 4 U disk enclosures is a multiple of 8, the configuration of 4 U SAS disk enclosures and expansion ports is shown in Figure 7-8.
  Figure 7-8 Configuration of 4 U SAS disk enclosures and expansion ports
  

  The green and orange areas indicate level-1 and level-2 disk enclosures respectively (that is, first and second disk enclosures in a loop). On the right of a disk enclosure ID is the port ID of the controller enclosure connecting to the disk enclosure. For example, DAE000 indicates the level-1 disk enclosure connecting to port P0 in slot 6 of controller enclosure 0, and DAE001 indicates the level-2 disk enclosure connecting to port P0 in slot 6 of controller enclosure 0.

2 U and 4 U SAS Disk Enclosures Intermixed (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 sixteen 2 U disk enclosures or eight 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 7-9 Configuration of disk enclosures and expansion ports

The green, orange, and yellow areas indicate the level-1 and level-2 disk enclosures respectively (that is, the first and second disk enclosures in a loop). On the right of a disk enclosure ID is the port ID of the controller enclosure connecting to the disk enclosure. For example, DAE000 indicates the level-1 disk enclosure connecting to port P0 in slot 6 of controller enclosure 0, and DAE001 indicates the level-2 disk enclosure connecting to port P0 in slot 6 of controller enclosure 0.

• 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 principle is the same as that of installing 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 that of 4 U disk enclosures is not a multiple of 8:

  The number of remaining 2 U disk enclosures is H (remainder of the total number of 2 U disk enclosures divided by 16) and that of remaining 4 U disk enclosures is K (remainder of the total number of 4 U disk enclosures divided by 8). Disk bays and system bays use the same disk enclosure layout. 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. Install 2 U disk enclosures in a system bay preferentially.
    • 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 laying out 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. Install 2 U disk enclosures in a system bay preferentially.
    • 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 laying out 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 laying out 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.

2 U and 4 U SAS Disk Enclosures Intermixed (Up to Four Disk Enclosures in a Loop)

If 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 sixteen 2 U disk enclosures or eight 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 7-10 Configuration of disk enclosures and expansion ports

The green, orange, yellow, and pink areas indicate the level-1, level-2, level-3, and level-4 disk enclosures respectively (that is, first, second, third, and fourth disk enclosures in a loop). On the right of a disk enclosure ID is the port ID of the controller enclosure connecting to the disk enclosure. For example, DAE000 indicates the level-1 disk enclosure connecting to port P0 in slot 6 of controller enclosure 0, and DAE001 indicates the level-2 disk enclosure connecting to port P0 in slot 6 of controller enclosure 0.

• 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:

  Install 2 U and 4 U disk enclosures in different bays. The layout principle is the same as that of installing 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 (remainder of the total number of 2 U disk enclosures divided by 32) and that of remaining 4 U disk enclosures is K (remainder of the total number of 4 U disk enclosures divided by 16). Disk bays and system bays use the same disk enclosure layout. 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. Install 2 U disk enclosures in a system bay preferentially.
    • 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 laying out 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. Install 2 U disk enclosures in a system bay preferentially.
    • 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 laying out 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 laying out 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.

Smart Disk Enclosures Only

If only smart disk enclosures are configured, a maximum of eight smart disk enclosures are required for a bay in full configuration. Each smart disk enclosure occupies 4 U. For example, if DAE000 is installed in 3 U and 4 U, then keep 1 U and 2 U idle.

• If the number of smart disk enclosures is a multiple of 8, the configuration of smart disk enclosures and expansion ports is shown in Figure 7-11.
  Figure 7-11 Configuration of smart disk enclosures and expansion ports
  

  The green, orange, yellow, and pink areas indicate the level-1, level-2, level-3, and level-4 disk enclosures respectively (that is, first, second, third, and fourth disk enclosures in a loop). On the right of a disk enclosure ID is the port ID of the controller enclosure connecting to the disk enclosure. For example, DAE000 indicates the level-1 disk enclosure connecting to port P0 in slot 6 of controller enclosure 0, and DAE001 indicates the level-2 disk enclosure connecting to port P0 in slot 6 of controller enclosure 0.

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

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

      Allocate disk enclosures to loops 0 to 7 in the sequence of DAE000 > DAE010 > DAE020 > DAE030 > DAE001 > DAE011 > DAE021 > DAE031.

    • Each loop contains up to four disk enclosures.

      Install level-1 and level-2 disk enclosures in the same bay, and install level-3 and level-4 disk enclosures in the same bay. Disk bays and system bays use the same disk enclosure layout. The following uses system bay 0 and disk bay 0_5 as an example.

      • Allocate level-1 and level-2 disk enclosures to loops 0 to 7 in system bay 0 in the sequence of DAE000 > DAE010 > DAE020 > DAE030 > DAE001 > DAE011 > DAE021 > DAE031.
      • Allocate level-3 and level-4 disk enclosures to loops 0 to 7 in disk bay 0_5 in the sequence of DAE002 > DAE012 > DAE022 > DAE032 > DAE003 > DAE013 > DAE023 > DAE033.

2 U SAS and Smart NVMe Disk Enclosures Intermixed

If smart NVMe disk enclosures and 2 U SAS disk enclosures are intermixed, a loop supports up to one smart NVMe disk enclosure or four 2 U SAS disk enclosures.

• Smart NVMe disk enclosures can be installed only in system bays. A system bay supports up to four smart NVMe disk enclosures and they must be installed in the upper half of the system bay. Each smart NVMe disk enclosure occupies 4 U space. For example, if disk enclosure DAE008 is installed in the 19 U to 20 U position, the 17 U to 18 U position must be idle.
• If 2 U SAS disk enclosures are installed in a system bay, the system bay supports up to eight 2 U SAS disk enclosures and they must be installed in the lower half of the system bay. If 2 U SAS disk enclosures are installed in a disk bay, the disk bay supports up to sixteen 2 U SAS disk enclosures.

Figure 7-12 shows the layout of fully loaded system bay 0 and disk bays 0 to 3.

Figure 7-12 Bay layout and expansion port ID

The green, orange, yellow, and pink areas indicate the level-1, level-2, level-3, and level-4 disk enclosures respectively (that is, first, second, third, and fourth disk enclosures in a loop). On the right of a disk enclosure ID is the port ID of the controller enclosure connecting to the disk enclosure. For example, DAE000 indicates the level-1 disk enclosure connecting to port P0 in slot 6 of controller enclosure 0, and DAE001 indicates the level-2 disk enclosure connecting to port P0 in slot 6 of controller enclosure 0.

4 U SAS and Smart NVMe Disk Enclosures Intermixed

If smart NVMe disk enclosures and 4 U SAS disk enclosures are intermixed, a loop supports up to one smart NVMe disk enclosure or two 4 U SAS disk enclosures.

• Smart NVMe disk enclosures can be installed only in system bays. A system bay supports up to four smart NVMe disk enclosures and they must be installed in the upper half of the system bay. Each smart NVMe disk enclosure occupies 4 U space. For example, if disk enclosure DAE008 is installed in the 19 U to 20 U position, the 17 U to 18 U position must be idle.
• If 4 U SAS disk enclosures are installed in a system bay, the system bay supports up to four 4 U SAS disk enclosures and they must be installed in the lower half of the system bay. If 4 U SAS disk enclosures are installed in a disk bay, the disk bay supports up to eight 4 U SAS disk enclosures.

Figure 7-13 shows the layout of fully loaded system bay 0 and disk bays 0 to 3.

Figure 7-13 Bay layout and expansion port ID

The green and orange areas indicate the level-1 and level-2 disk enclosures respectively (that is, first and second disk enclosures in a loop). On the right of a disk enclosure ID is the port ID of the controller enclosure connecting to the disk enclosure. For example, DAE000 indicates the level-1 disk enclosure connecting to port P0 in slot 6 of controller enclosure 0, and DAE001 indicates the level-2 disk enclosure connecting to port P0 in slot 6 of controller enclosure 0.

2 U SAS, 4 U SAS, and Smart NVMe Disk Enclosures Intermixed

If smart NVMe disk enclosures are intermixed with 2 U and 4 U SAS disk enclosures, a loop supports up to one smart NVMe disk enclosure, two 4 U SAS disk enclosures, or four 2 U SAS disk enclosures.

• Smart NVMe disk enclosures can be installed only in system bays. A system bay supports up to four smart NVMe disk enclosures and they must be installed in the upper half of the system bay. Each smart NVMe disk enclosure occupies 4 U space. For example, if disk enclosure DAE008 is installed in the 19 U to 20 U position, the 17 U to 18 U position must be idle.
• 4 U SAS disk enclosures are installed in disk bays 0 and 2. A disk bay supports up to four 4 U SAS disk enclosures and they must be installed in the upper half of the disk bay.
• If 2 U SAS disk enclosures are installed in a system bay, the system bay supports up to eight 2 U SAS disk enclosures and they must be installed in the lower half of the system bay. If 2 U SAS and 4 U SAS disk enclosures are installed in the same disk bay, the disk bay supports up to eight 2 U SAS disk enclosures and they must be installed in the lower half of the disk bay. If a disk bay houses only 2 U SAS disk enclosures, it supports up to sixteen 2 U SAS disk enclosures.

Figure 7-14 shows the layout of fully loaded system bay 0 and disk bays 0 to 3.

Figure 7-14 Bay layout and expansion port ID

The green, orange, yellow, and pink areas indicate the level-1, level-2, level-3, and level-4 disk enclosures respectively (that is, first, second, third, and fourth disk enclosures in a loop). On the right of a disk enclosure ID is the port ID of the controller enclosure connecting to the disk enclosure. For example, DAE000 indicates the level-1 disk enclosure connecting to port P0 in slot 6 of controller enclosure 0, and DAE001 indicates the level-2 disk enclosure connecting to port P0 in slot 6 of controller enclosure 0.