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Phoenix RPC12 Series CLI Reference Manual • September 2008
stripe size
The number of data disks in a virtual disk multiplied by the chunk size.
subvirtual disk
One of multiple RAID 1 virtual disks across which data is striped to
form a RAID 10 virtual disk; or one of multiple RAID 5 virtual disks
across which data is striped to form a RAID 50 virtual disk.
system
See
.
Tbyte
Terabyte (TB).
TCP/IP
Transmission Control Protocol/Internet Protocol.
topology
The logical layout of the components of a computer system or network
and their interconnections. Topology deals with questions of what
components are directly connected to other components from the
standpoint of being able to communicate. It does not deal with
questions of physical location of components or interconnecting cables.
(SNIA)
trap
A type of SNMP message used to signal that an event has occurred.
(SNIA)
UPS
Uninterruptible Power Supply.
vdisk
Abbreviation for virtual disk.
vdisk spare
A disk drive that is marked as a spare to support automatic data
rebuilding after a disk drive associated with a virtual disk fails. For a
vdisk spare to take the place of another disk drive, it must be at least
equal in size to the failed disk drive and all of the virtual disks
dependent on the failed disk drive must be redundant—RAID 1, 10, 3,
5, or 50.
verify
A process that checks the integrity of the redundant data on fault-
tolerant virtual disks. For RAID 3, 5, and 50, the verify process
recalculates the parity of data stripes in each of the virtual disk’s RAID
stripe sets and compares it with the stored parity. If a discrepancy is
found, an error is reported and the new correct parity is substituted for
the stored parity. For RAID 1 and 10, the verify process checks for
mirror mismatches. If an inconsistency is encountered, data is copied
from the master disk drive to the slave disk drive. If a bad block is
encountered when the parity is regenerated, the data is copied from the
other disk drive, master or slave, to the reporting disk drive reallocating
the bad block.
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