DataDirect Networks S2A9550, User Manual

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D a t a D i r e c t N e t w o r k s S 2 A 9 5 5 0 U s e r G u i d e
M a n a g i n g t h e S 2 A 9 5 5 0
3.2.9.6 Moving a LUN (Dual Mode Only)
If you need to change the ownership of a LUN from one S2A9550 to the partner when the units are
in dual mode, type:
LUN MOVE=x
<Enter>,
where “x” is the Logical Unit number <0..127>
(Figure 3-25)
.
This command can only be successfully accomplished if the LUN does not share tiers with other
LUNs. Thus, if LUN 0 is on tiers 1,2,3 and LUN 1 is on tiers 4,5,6, both LUNs can be moved. If,
however, LUN 0 is on tiers 1,2,3 and LUN 1 is on tiers 3,4,5, neither LUN can be moved.
3.2.9.7 Deleting a LUN
If you need to delete a LUN from the system, type: LUN DEL=x
<Enter>,
where “x” is the LUN <0..127>.
This will erase all the data on the LUN . You can only delete a LUN which is owned by the S2A9550 that
you are logged into.
3.2.9.8 SCSI Reservations
The LUN RELEASE=x|x.y command allows you to release all SCSI reservations on a LUN. The
command LUN RESERVATIONS can be used to view the current SCSI reservations on all of the LUNs
in the system. The LUN to be released can be specified by “x”, where “x” is in the range <0..127>. A
LUN segment in a LUN group can be specified by “x.y”, where “x” is the LUN group in the range
<0..127> and ”y” is the segment of the group in the range <0..63>.
The LUN START command lets you start all the LUNs that have been stopped by a SCSI START/STOP
request. This parameter is not related to the LUN STOP command.
3.2.10 Automatic Drive Rebuild
The S2A9550’s automatic drive failure recovery procedures ensure that absolute data integrity is
assured while operating in degraded mode.
In the event of a drive failure, the S2A9550 will automatically initiate a drive rebuild using a spare
drive if the “autorebuild” function has been enabled. You may use the
TIER
command to display the
current setting
(Figure 3-26)
. The rebuild operation can take up to several hours to complete,
depending on the size of the disk and rate of rebuild.
Figure 3-25 Moving a LUN Screen
S2A [1]: lun move=0
LUN 0 is owned by this S2A.
Do you want to move ownership to the OTHER S2A? (y/n):
Tier Status
Space Available
(Mbytes) Owner Disk Status Lun List
Capacity
(Mbytes)
ABCDEFGHPS
-------------------------------------------------------------------
280012 280012
ABCDEFGHPS 280012 280012
ABCDEFGHPS 280012 280012
Automatic disk rebuilding is Enabled
Figure 3-26 Automatic Disk Rebuilding Parameter
S2A [1]: tier
System rebuild extent: 32 Mbytes
System Capacity 840036 Mbytes, 840036 Mbytes available.
System rebuild delay: 60
Tier
1
2
3