XM Satellite Radio AA-RU5HC-TE Manual Do Utilizador
SSSU Command Reference
41
Command View EVA Storage System Scripting Utility Reference Guide
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Vraid0—Provides no data protection. It distributes data among its member
disks into stripes and uses all members to process I/O requests. This method
has no overhead associated with duplication of information and provides the
highest performance.
disks into stripes and uses all members to process I/O requests. This method
has no overhead associated with duplication of information and provides the
highest performance.
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Vraid1—Provides the highest level of data protection but uses the most
space. It duplicates data written to one disk onto a backup disk. In a multidisk
configuration, Vraid1 mirrors each pair of disks to each other. These disk
pairs can then be striped to create a virtual disk.
space. It duplicates data written to one disk onto a backup disk. In a multidisk
configuration, Vraid1 mirrors each pair of disks to each other. These disk
pairs can then be striped to create a virtual disk.
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Vraid5—Provides a moderate level of data protection. This method
distributes the parity information among all disk members. If one drive fails,
the failed disk can be recreated after it is replaced.
distributes the parity information among all disk members. If one drive fails,
the failed disk can be recreated after it is replaced.
VDISK=
The source virtual disk for this snapshot.
WORLD_WIDE_LUN_NAME=
Sets the World Wide LUN Name.
Required switch
The following switch is required with the ADD SNAPSHOT command:
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VDISK=
Examples
ADD SNAPSHOT payroll_backup VDISK="\Virtual
Disks\payroll\ACTIVE" ALLOCATION_POLICY=DEMAND
ADD SNAPSHOT wed_nite_biz VDISK="\Virtual
Disks\daily_biz\ACTIVE" ALLOCATION_POLICY=FULLY
The first example creates a snapshot payroll_backup from the ACTIVE partition
of Vdisk family payroll that uses capacity only as needed.
of Vdisk family payroll that uses capacity only as needed.
The second example creates a snapshot wed_night_biz from the ACTIVE partition
of the family daily_biz while reserving all capacity necessary to create the
snapshot.
of the family daily_biz while reserving all capacity necessary to create the
snapshot.
Note:
To delete snapshots created by ADD SNAPSHOT, use the DELETE VDISK
command.