Exporting jbod disks – Avago Technologies 3ware 9650SE-12ML (Channel) User Manual
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Configuring Your Controller
96
3ware SAS/SATA RAID Software User Guide, Version 9.5.1
To enable or disable spinup and set the delay between spinups
1
At the main 3BM screen,
Tab
to
Policy
and press Enter.
2
On the Policy
Control
screen,
Tab
through these fields, making the
choices you want to use:
•
Staggered Spinup:
Choose enabled or disabled.
•
Number of Drives Per Spinup:
Select the number of drives,
depending on the number of ports on the controller.
•
Delay between spinup:
Select the number of seconds—from 1 to 6.
3
Tab
to
the
OK
button and press
Enter
.
You will notice a short delay as 3BM makes the policy changes.
Exporting JBOD Disks
By default, JBOD disks (unconfigured disks) connected to the 3ware RAID
controller are not exported to the operating system. This means that any drives
you leave unconfigured are not seen by the operating system, and cannot be
used for storage. When Export JBOD Disks is set to No, you make individual
disks available for use by configuring them as Single Disks.
If you want unconfigured disks to be available on your computer, you can
change this setting in 3BM or CLI.
It is possible to enable or disable automatic detection of drives on the controller’s
ports for staggered spinup during hot swapping of drives. This feature is only
available in the CLI using the autodetect=on|off command. For more information,
see /cx set autodetect=on|off disk=
Guide.
Note:
Some hard drives require that the power management jumper (PM2) be set
to enable staggered spinup, in order for the SATA OOB option to be used. For more
information, see the knowledgebase article 14889, at
http://www.3ware.com/KB/article.aspx?id=14889
Note:
It is recommended that JBODs not be made available to the operating
system. The advantages of working with configured Single Disks over JBOD are:
If interrupted, a single disk media scan will continue from where it left off, while a
JBOD media scan must restart from the beginning.
Single disks can take advantage of the controller caching and the configuration is
persistent.
Single disks can be migrated to redundant units in the future (e.g. A single disk will
be able to be mirrored to another drive, creating a RAID 1 array).