DataDirect Networks S2A9550, User Manual

Page: 53 / 118

M a n a g i n g t h e S 2 A 9 5 5 0
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
41
LUN Reservations
The
LUN RESERVATIONS
command displays a list of all valid LUNs in the system and shows which
LUNs currently have a SCSI reservation and which initiator holds the reservation
(Figure 3-16)
. The
command
LUN RELEASE
can be used to release any SCSI reservations on a LUN.
3.2.2.4 Adding/Removing Storage Assets
The S2A9550 supports up to 125 tiers (depending on individual disk enclosure’s AL_PA numbering
scheme). As your storage demand grows, new tiers can easily be added without affecting system
operations.
Use the
DISK SCAN
command to check each disk channel in the system for any new disks. New tiers
are automatically added to the system when the disks are detected. A tier is automatically deleted if
it is not in use by any of the LUNs and all of the disks in the tier are removed or moved to another
location.
3.2.2.5 Status of Drive Enclosures
The
SES
command displays all current drive enclosure failures
(Figure 3-17)
, detected by the SCSI
Enclosure Services (SES) as well as provide a means to access SES specific functions such as disk,
channel, LUN, or tier visual identification. Drive failures are not shown by the SES command; you
must use the TIER command to view drive status.
If your enclosures provide redundant SES communication paths, the error is reported twice. “EncID”
is the World Wide Name of the enclosure that reported the failure. The last four digits of the WWN
is the last four digits of the enclosure’s serial number.
The
SES=ON
command saves the SES state to the parameter blocks, and startups the SES monitors.
The
SES=OFF
command saves the SES state to the parameter blocks, and shuts down the SES
monitors.
Logical Unit Configuration
Tier
End
LUN Block Tier
Start
1FFFFF
-------------------------------------------------------------------------
0 0 0
Figure 3-15 LUN Configuration Screen
S2A [1]: lun config
LUN
512
Capacity
1000000
(Blocks) Size Offset
Tier List
1 2
2FFFFF 200000 0 1 512 2000000 1 2 3 4
27FFFF 200000 0 1.00 512 1000000
2FFFFF 280000 1000000 1.01 512 1000000
Current SCSI LUN Reservations
Port LUN Status
-------------------------------------------------------------------------
No SCSI Reservations 0
Figure 3-16 LUN Reservations Screen
S2A [1]: lun reservations
Reservation ID
Ready
Label User Name
No SCSI Reservations 1 Ready
No SCSI Reservations 2 Ready
EncID:50050CC0000033C8: Power Supply 1 :DC Power Failure
Figure 3-17 Displaying the Current Disk Enclosure Failures
S2A 1]: ses