About Inoperable Units; Locating A Drive By Blinking Its Led - 3Ware 9550SXU-12 User Manual

Maintaining Units

About Inoperable Units

Locating a Drive by Blinking Its LED

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You can still read and write data from a degraded unit, but the unit will not be
fault tolerant until it is rebuilt using the Rebuild feature.
When a RAID unit becomes degraded, it is marked as such, and the drive(s)
that failed are marked as
3DM pages. If supported by your enclosure, the LED for failed drives may
turn red.
You should replace the failed drive and rebuild the unit as soon as it is
convenient to do so. The unit will not be fault tolerant until it has been rebuilt.
Rebuilding can occur automatically, depending on your settings. For more
information, see "Rebuilding Units" on page 167.
Units become inoperable when there are no longer enough drives in the unit
for it to function. For example, a RAID 5 unit created from four drives
becomes degraded if one drive fails or is removed, but becomes inoperable if
two drives fail or are removed. A RAID 6 unit created from five drives
becomes degraded if one or two drives is removed, but becomes inoperable if
three drives fail or are removed.
Data on an inoperable unit cannot be accessed unless the missing drives are
reconnected.
If you have data on a unit that is currently "inoperable," contact technical
support.
If you use a supported enclosure with enclosure services, you may be able to
easily identify the drives in a unit, or locate an individual drive, by causing the
LEDs associated with the drives to blink.
You can issue the command to blink the LED through 3DM or 3BM.
(For details about what the different LED patterns on the enclosure may
mean, see "Enclosure Drive LED Status Indicators" on page 149.)
To blink the LED for a drive through 3DM
1 Do one of the following:
• Choose
Information > Drive Information
3DM. On the Drive Information page, identify the drive you want to
physically locate.
3ware SAS/SATA RAID Software User Guide, Version 9.5.1
in the 3BM screens and
Not In Use
in the
Degraded
from the main menu in