CLI Guide

load-balance groups between controller modules, use auto or omit this parameter. In Single Controller
mode, this parameter is ignored; the system automatically load-balances groups in anticipation of the
insertion of a second controller in the future.
chunk-size 64k|128k|256k|512k
Optional for linear storage. Prohibited for virtual storage. Prohibited for ADAPT.
For linear storage, this specifies the amount of contiguous data, in KB, that is written to a disk-group
member before moving to the next member of the group. For NRAID and RAID 1, chunk-size has
no meaning and is therefore not applicable. For RAID 50, this option sets the chunk size of each
RAID-5 subgroup. The chunk size of the RAID-50 group is calculated as: configured-chunk-size x
(subgroup-members - 1). The default is 512k.
For virtual storage, the system will use one of the following chunk sizes, which cannot be changed:
● RAID 1: Not applicable.
● RAID 5 and RAID 6:
○ With 2,4, or 8 non-parity disks: 512k. For example, a RAID-5 group with 3, 5, or 9 total disks or
a RAID-6 group with 4, 6, or 10 total disks.
○ Other configurations: 64k
● RAID 10: 512k
For an ADAPT disk group, the system will automatically determine the proper chunk size.
disks disks
Specifies the IDs of the disks to include in the group. For disk syntax, see Command syntax on page
17. The minimum and maximum numbers of disks supported for each RAID level are:
NRAID: 1 (linear storage only; not fault tolerant)
RAID 0: 2-16 (linear storage only; not fault tolerant)
RAID 1: 2
RAID 3: 3-16 (linear storage only)
RAID 5: 3-16
RAID 6: 4-16
RAID 10: 4-16
RAID 50: 6-32 (liner storage only)
ADAPT: 12-128
RAID 10 requires a minimum of two RAID-1 subgroups each having two disks. RAID 50 requires
a minimum of two RAID-5 subgroups each having three disks. NRAID is automatically used for a
read-cache disk group with a single disk. RAID 0 is automatically used for a read-cache disk group
with multiple disks.
level nraid|raid0|r0|raid1|r1|raid3|r3|raid5|r5|raid6|r6|raid10|r10|
raid50|r50|adapt
Required for a linear or virtual group. Prohibited for a read-cache disk group. Specifies the RAID level
to apply to the member disks.
mode online|offline
Optional for a linear group. Prohibited for a virtual or read-cache disk group. Specifies whether the
group is initialized online or offline.
● online : After a brief initialization period (seconds), the disk-group stateis set to FTOL and I/O
operations can be performed on the disk group. Subsequently, an initialization pass across the LBA
extent is performed during which the existing data on the member data disks of the disk group
is read, parity is generated, and only parity is written to the disk group (the data-area contents
are preserved and not zeroed). This pass can take hours to complete on a large disk group.Online
mode is the defaultfor a linear disk group.Online mode is always used for a virtual disk group.
● offline : The disk group will be in an unavailable, offline ( OFFL) state during the initialization
process, during which zeros are written to all data and parity sectors of the LBA extent of the disk
group. This can take hours to complete on a large disk group but is faster than online mode. When
initialization is complete, the disk group state is set to FTOL and I/O operations can be performed
on the disk group.
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Alphabetical list of commands