CLI Guide

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.
pool a|b
Required for a virtual or read-cache disk group. Prohibited for a linear disk group. Specifies the name of the
virtual pool to contain the disk group. If the pool does not already exist, it will be created.
spare disks
Optional for a linear disk group. Prohibited for a virtual or read-cache disk group. Prohibited for ADAPT.
Specifies the IDs of 1-4 dedicated spares to assign to a RAID 1, 3, 5, 6, 10, or 50 disk group. For disk syntax,
see Command syntax on page 17. Only global spares are used for virtual disk groups.
type linear|virtual|read-cache
Alphabetical list of commands
31