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4.4.7 Rescue Raid Set
When the system is powered off while the RAID Sets are updating, they may be corrupted and
disappear from the interface. The “RESCUE” function can recover the missing RAID Set
information. The RAID controller uses the time as the RAID set signature. The RAID set may
have a different time after the RAID set is recovered. The “SIGANT” function can regenerate the
signature for the RAID set.
4.5 Volume Set Function
The Volume Set Function menu allows you to manage the Volume Sets on the disk array. A
Volume Set is seen by the host system as a single logical device. It is organized in a RAID
configuration with one or more physical disks within a RAID set. The RAID configuration will
determine the performance, redundancy, and capacity of the Volume Set. A Volume Set can
consume all or a portion of the disk capacity available in a RAID Set. Multiple Volume Sets can
exist on a group of disks in a RAID Set.
The following is the volume set features for the freeStor Xpand 1500C:
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Volume sets of different RAID levels can coexist on the same raid set.
•
Up to 16 volume sets can be created in one RAID set.
4.5.1 Create Volume Set
To create a volume set, follow these steps:
1. Click “Volume Set Function” from the main menu, then click “Create Volume “Set”.
2. Select the RAID set to create the volume set on and click “Submit”.
3. Set the properties for the new volume set. The properties are as follows:
Volume Name:
The default volume name will always appear as Volume Set #. You can
rename the volume set name providing it does not exceed the 15 character limit.
Capacity:
The maximum volume size is the default setting. The capacity can be increased
or decreased by using the “up” and “down” arrow keys. The volume set’s capacity must be
less than or equal to the total capacity of the RAID set on which it resides.
RAID Level:
Sets the RAID level for the Volume Set. To change, highlight “Raid Level” and
press <Enter>. The available RAID levels for the current Volume Set are displayed. Select a
RAID level and press <Enter> to confirm.
Initialization:
Normal Initialization takes longer than Fast Initialization, but operates in the
background so you can use the newly created volume immediately. For Fast Initialization,
the initialization must be completed before the volume set is ready to use.
Strip Size:
This parameter sets the size of the segment written to each disk for RAID 0, 1,
1+0, 5 or 6. You can set the stripe size to 4 KB, 8 KB, 16 KB, 32 KB, 64 KB, or 128 KB.
Cache Mode:
User can set the cache mode to Write-Through Cache or Write-Back Cache.
Tag Queuing:
The Enabled option is useful for enhancing overall system performance
under multi-tasking operating systems. The Command Tag (Drive Channel) function controls
the SCSI command tag queuing support for each drive channel. This function should
normally remain enabled. Disable this function only when using older SCSI drives that do
