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Software Installation and User’s Guide
ICP RAID Navigator
RAID 4 and RAID 5 drives contain parity information, which is used in the event of drive
failure. The parity information is calculated from the user data on the disk array. On RAID
4 disk arrays the parity data is stored on a single disk (parity disk), on RAID 5 disk arrays
the parity data is distributed over all drives (parity striping). This option verifies online the
parity information of the selected RAID 4 or RAID 5 array drive. If this option is selected
for several array drives, the processes are put into a queue and performed one after the
other.
If a parity error is detected, find the reason for the data corruption. A good indication of
data corruption can be retries on the SCSI bus. If the retry-counter shows high numbers,
this might be the problem. Possible reasons for parity error are bad cabling, termination or
hardware error from a defective drive or an overheated drive. After removing the reason
of the data corruption you can carry out parity recalculate to ensure that the parity
information of this disk array becomes valid.
Figure 11-141. Parity Verify
11.5.13
Progress Information
Click the right mouse button on the array drive or physical drive icons.
The progress information window shows the progress (elapsed time, estimated time,
percentage of completion) of a parity verify, a disk array build, or a surface check. During
an array drive rebuild, the information (user data and/or parity) of a specific logical drive
is calculated from the user data and parity information of the other logical drives and
written to this new logical drive. During a build of an array drive parity information is
calculated and written to a specific logical drive (RAID 1/4) or striped over the array drive
(RAID 5).
Figure 11-142. Parity Verify Progress Information
11.5.14
Expand Array
Click the right mouse button on the array drive icon.
There are two functions that are available within this option:
Summary of Contents for 2074700-R - ICP Vortex GDT8514RZ RAID Controller
Page 1: ...Preliminary ICP RAID Software Software Installation and User s Guide Version 1 2 7 June 2003 ...
Page 23: ...Software Installation and User s Guide 23 Introduction ...
Page 68: ...68 Software Installation and User s Guide Installing Linux ...
Page 92: ...92 Software Installation and User s Guide Installing Berkeley UNIX FreeBSD ...
Page 214: ...214 Software Installation and User s Guide Fibre Channel Features ...