Adaptec 2074700-R User Guide - Page 180
Progress Information, Expand Array
View all Adaptec 2074700-R manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 180 highlights
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: 180 Software Installation and User's Guide