Overland Storage SnapServer Administrator's Manual page 118

SnapServer 7.0 Administrator's Guide
• Disabling write cache for an iSCSI disk does not eliminate all potential risk of data
loss due to an unexpected loss of power as each disk drive contains its own internal
cache of 8 MB or more.
Disconnect iSCSI Disk Initiators before Shutting Down the Server
Shutting down the server while a client initiator is connected to an iSCSI disk appears to
the client initiator software as a disk failure and may result in data loss or corruption.
Make sure any initiators connected to iSCSI disks are disconnected before shutting down
the server.
Ignore Volume is Full Message
When an iSCSI disk is created, the volume or storage pool allocates the specified capacity to
the disk. If all volume or storage pool capacity is allocated to the iSCSI disk and email
notification is enabled, the SnapServer may generate a Volume is Full message. This
message indicates only that the volume capacity is fully allocated to the iSCSI disk and is
not available to other resources. To determine the status of iSCSI disk storage utilization,
use the tools provided on the client machine.
iSCSI Disk Naming Conventions
iSCSI disks are assigned formal IQN names. These appear as the iSCSI device names that
the user chooses (or types) when connecting from a client initiator to the SnapServer target,
and also on the iSCSI Disk details page.
The format of IQN names for GuardianOS iSCSI disks on the SnapServer is:
iqn.1997-10.com.SnapServer:[servername]:[diskname]
where [servername] is the name of the SnapServer, and [diskname] is the name of the
iSCSI disk on the target SnapServer. For example:
iqn.1997-10.com.SnapServer:snap123456:iscsi0
NOTE: Users with iSCSI disks created in earlier GuardianOS versions will see a shortened IQN
iqn.[servername].[iscsidiskname]
The format of IQN names for VSS-based iSCSI disks on the SnapServer is:
iqn.1997-10.com.SnapServer:[servername]:[diskname].[nnn]
where [servername] is the name of the SnapServer, [diskname] is the name of the iSCSI
disk on the target SnapServer, and [nnn] is a sequential number starting from 000. For
example:
iqn.1997-10.com.SnapServer:snap123456:iscsi0.000
The format of IQN names for VDS-based iSCSI disks on the SnapServer is:
iqn.1997-10.com.SnapServer:[servername]:[diskname]-snap[n]
where [servername] is the name of the SnapServer, [diskname] is the name of the iSCSI
disk on the target SnapServer, and [n] is a sequential number starting from 0. For
example:
iqn.1997-10.com.SnapServer:snap123456:iscsi0-snap0
10400317-001 10/2011
name in the following format:
©2010-11 Overland Storage, Inc.
6 – Other Storage Options
6-19