Sun Microsystems Netra X4200 M2, Руководство по обслуживанию

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Appendix E Serial Attached SCSI BIOS Configuration Utility 197
5. Press M to keep the existing data on the first disk or press D to overwrite it.
If you keep the existing data, this is called a migration. The first disk will be
mirrored onto the second disk, so the data you want to keep must be on the first
disk added to the volume. Data on all other disks will be lost.
As disks are added the Array Size field will change to reflect the size of the new
volume. There are several limitations when creating a RAID 1 volume:
■
All disks must be SAS (with SMART support).
■
Disks must have 512-byte blocks and must not have removable media.
■
There must be two drives in a valid volume.
6. (Optional) Add a hot spare to the volume by moving the cursor to the Hot
Spare column and pressing the + key, - key, or space bar.
7. When the volume has been fully configured, press C and select Save Changes,
then exit this menu to commit the changes.
The Configuration Utility will pause while the array is being created.
Note – RAID 1 provides protection against the failure of a single disk. When a disk
fails, it is rebuilt to a hot spare if one is available. This can greatly increase the level
of protection that RAID 1 provides.
Note – Even though multiple volumes can be created, the hot spare is a global hot
spare. Only one active hot spare is allowed for all volumes.
Managing Hot-Spares
Follow these steps to add a hot- spare to a RAID 1 volume.
1. Select Manage Hot Spare.
2. Select a disk from the list by pressing the + key, - key, or space bar.
Note – A hot-spare must be valid RAID disk, as defined in “Creating a RAID 1
Volume” on page 196 .
3. After you select the hot-spare disk, press C.
4. Select Save Changes then exit this menu to commit the changes.
The Configuration Utility will pause while the hot spare is being added.