CRU RTX 800-TR Manual do utilizador - Página 7

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Errors on one or two

drives

Mistaken replacement of

good drive(s) when other

RAID 6

members of the RAID

group have failed

Error during rebuild

Errors on three or more

drives

7.1 Rebuilding the RAID Group

The recovery methods listed in this subsection can be used

to recover from failures that are non-destructive to your

data. Although the RAID group remains intact, its data is at

an increased risk of becoming corrupted and the failed hard

drive should be replaced as soon as possible. The data will

only be corrupted if the RAID group fails and goes offline. If

enough drives fail, the RAID group will be forced offline. See

Section 2.1 for information on how many drives can fail in

a given RAID mode.

7.1.1 Automatic Replacement

If a Hot Spare pool has been created, the RTX enclosure

will automatically rebuild data to a hard drive that is

inside the pool. If no drive is available in the Hot Spare

pool but Auto-Rebuild is enabled, the RTX enclosure will

use any available hard drive in the RTX enclosure that is

not currently part of the RAID group to rebuild the RAID

group.

If neither of these options is enabled, you will have to

manually replace the failed drive.

See Section 5.1 for information on how to create a Hot

Spare pool or Section 6 for information on how to enable

Auto-Rebuild.

7.1.2 Manual Replacement

a. Use the ATTO ConfigTool to log in to the

ThunderStream SC 3808E properties as detailed

in Section 3.2.3 , Steps A through E.

b. Right click on the degraded RAID group in the

Groups panel and select Rebuild Group.

Page 7

Section 7.1.1: Automatic Replace-

ment or Section 7.1.2: Manual Re-

placement

Section 7.1.3: Recovering from

Replacement of a Wrong Drive

Section 7.2: Data Recovery

A RAID group members tab displays in the bottom

panel. Select an unallocated drive from the drive

inventory in the above panel and drag it over the

degraded RAID drive in the members tab.

If the selected drive is appropriate, the faulted drive is

replaced and the RAID will rebuild.

7.1.3 Recovery from Replacement of a Wrong Drive

When a drive fails but the wrong drive is replaced,

the RAID group will go offline instead of being rebuilt.

Replace the wrongly-replaced drive with the original,

then identify and replace the real failed hard drive. A

rebuild should begin automatically. But if it does not,

right click on the offline RAID group in the Groups panel

and select the option Rebuild Group.

7.2 Data Recovery

Basic Recovery Mode allows you to back up your data from

an offline or failed RAID group and restore it to a new RAID

Group. This method is not guaranteed to recover data

however. Any time a RAID group goes offline it means that

the integrity of the data has been compromised and some

or all of the data may have been corrupted. You should run

file system repair tools to validate all of the data on the RAID

after recovery before attempting to use it again.

a. Use the ATTO ConfigTool to log in to the

ThunderStream SC 3808E properties as detailed in

Section 3.2.3 , Steps A through E.

b. Right click on the offline RAID Group and select the

option Basic Recovery.

The RAID Group status will change from Offline to Recovery

(Basic). Now you may use a host application to read the

remaining intact data off of the drives and back it up to

another location. The RAID group will remain in recovery

mode and there is no way to put this RAID group back

online. Once the data is backed up, use only good drives

to create a new RAID group and then restore the data to it.

CRU Mark

10.25.12

PMS 711

2 cyan