ICP GDT RS Series, Руководство пользователя

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(gray). While you are selecting Physical Drives for the new Host Drive, more and more pos-
sibilities become selectable.
You can select a single Physical Drive by clicking on it. If you want to select more than one
Physical Drive, simply draw a frame around the Physical Drives, or press the <ctrl> key and
then click on all the Physical Drives you want to combine to a new array.
When you have finished the selection of the Physical Drives, choose the type of Host Drive
you want to create and click on OK.
If the selected Host Drive uses data striping (RAID 0, 4, 5 or 10) you can change the default
striping size. If you have selected a configuration with Hot Fix Drives, you can choose be-
tween a Private Hot Fix Drive or a Pool Hot Fix Drive. After the Host Drive was created, you
can partition and format the Host Drive with the corresponding operating system utility.
If an array build started, you can monitor the progress of the array build by clicking the right
mouse button on the Host Drive and then selecting progress information.
K.5.7 Parity Verify
Click the right mouse button on the Array Drive icon.
RAID 4 and RAID 5 drives contain parity information, which is used in case of a 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 being distributed over all drives (parity striping). This option verifies online the par-
ity 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, you should try to find the reason for this data corruption. A
good indication for 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 or termination or a hardware error like a defective drive or a drive which is over-
heated.
After removing the reason of the data corruption you can carry out parity recalcu-
late to ensure that the parity information of this disk array becomes again valid.
K.5.8 Parity Recalculate
Click the right mouse button on the Array Drive icon.
A parity recalculate can be used to repair parity errors which have been previously detected
with a parity verify. A parity recalculation initiates the same process as used for a build on