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DataDirect Networks EF2800 FC RAID Storage System User Guide (V 1.0)
Managing Disk Drives & Enclosures
C
AUTION
:
We recommend that you disable write-back cache on disk
drives. Some disk drives delete their write-back cache if they encounter an
internal error, resulting in lost data.
To change the write-back cache setting:
1. From SAM, select Manage EF2800 > General Config > Disk
Configuration. The Disk Configuration page displays.
2. Select the Write-back Cache option you want.
3. Click Change Disk Option Configuration.
4. Select Manage EF2800 > Utilities and click Rescan to have your
changes take effect.
9.1.4 Displaying Disk Drive Cache Status
You can display the cache status of each disk drive. Any disk drives
with write-back cache enabled should be connected to a UPS in case of
power failure. If the disk drives are not on a UPS and power is lost
during disk writes, the array will lose any data in the disk’s write-back
cache.
To display disk cache status:
1. From SAM, select Manage EF2800 > Utilities > Disk Drive Utilities >
Display Disk Cache. The Display Disk Cache page displays.
2. Select the drive whose cache settings you want to see.
9.1.5 Enabling and Disabling SMART Changes
You can enable or disable the ability to change the Self-Monitoring,
Analysis and Reporting Technology (SMART) settings for all disk
drives connected to the EF2800. This can be set to Enable, Disable, or
Don’t Modify (which means the EF2800 should not change any disk
drive’s SMART settings). The default setting is Don’t Modify.
When you enable SMART, the SMART events are recorded in the event
log, which lets you monitor your disk drives or analyze why a disk drive
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