Adaptec 133U2 User Guide - Page 111

Downing the Drive, Pausing I/O to an Array Disk Drive

Page 111 highlights

Performing Array, Spare, and Disk Operations Downing the Drive Use this option to stop all data I/O to a member of an array and remove it from the array. You might need this option if the disk generates a S.M.A.R.T.1 alert indicating that it is about to fail. When you down an array member, a spare is activated immediately (if available) to replace it, and a reconstruct is triggered. Note: The Down a Drive command can be used only for array members, not for spare disks or single disks. Follow these steps to down a disk: 1 Click to open the Storage Configuration window. 2 Right-click the icon of the disk you want to down and select Down a Drive from the drop-down menu. If a spare is available, it replaces the downed disk immediately and a reconstruct of the array is triggered. 3 Wait until the Reconstruct operation is completed, and then continue with your work in the program. Pausing I/O to an Array Disk Drive Use this option to pause data I/O on a disk drive that is connected to an array controller. You can use this option to replace the disk if the array enclosure does not support hot swapping2. See the array enclosure documentation for more information. When you pause I/O to a disk drive, all other devices connected to the array controller are paused as well. I/O resumes automatically at the end of the pause period. 1 S.M.A.R.T. stands for Self-Monitoring Analysis and Reporting Technology. Hard drives that support this technology continually analyze their performance and generate an alert if they determine that the disk is likely to fail in the next few hours. Adaptec CI/O Management Software generates an event notification if it receives this alert, allowing you to replace the disk before it actually fails. 2 Hot swapping support means that the array enclosure electrically isolates the bad disk's SCSI connector from the SCSI bus while the disk is being swapped to prevent data corruption. Data can still be transferred to and from the remaining good disks while the bad drive is replaced. 7-13

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7-13
Performing Array, Spare, and Disk Operations
Downing the Drive
Use this option to stop all data I/O to a member of an array and
remove it from the array. You might need this option if the disk
generates a S.M.A.R.T.
1
alert indicating that it is about to fail. When
you down an array member, a spare is activated immediately (if
available) to replace it, and a reconstruct is triggered.
Note:
The Down a Drive command can be used only for
array members, not for spare disks or single disks.
Follow these steps to down a disk:
1
Click
to open the Storage Configuration window.
2
Right-click the icon of the disk you want to down and select
Down a Drive
from the drop-down menu. If a spare is
available, it replaces the downed disk immediately and a
reconstruct of the array is triggered.
3
Wait until the Reconstruct operation is completed, and then
continue with your work in the program.
Pausing I/O to an Array Disk Drive
Use this option to pause data I/O on a disk drive that is connected
to an array controller. You can use this option to replace the disk if
the array enclosure does not support hot swapping
2
. See the array
enclosure documentation for more information. When you pause
I/O to a disk drive,
all
other devices connected to the array
controller are paused as well. I/O resumes automatically at the end
of the pause period.
1
S.M.A.R.T. stands for Self-Monitoring Analysis and Reporting Technology.
Hard drives that support this technology continually analyze their
performance and generate an alert if they determine that the disk is likely
to fail in the next few hours. Adaptec CI/O Management Software
generates an event notification if it receives this alert, allowing you to
replace the disk before it actually fails.
2
Hot swapping
support means that the array enclosure electrically isolates the
bad disk’s SCSI connector from the SCSI bus while the disk is being
swapped to prevent data corruption. Data can still be transferred to and
from the remaining good disks while the bad drive is replaced.