Blue Coat Systems Appliance Trim Kit Blue Coat Systems SG Appliance Manual De Usuario
Chapter 3: Maintaining the SG Appliance
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Deleting an SG Appliance System
You can delete any of the system versions except the current running system. A locked
system must be unlocked before it can be deleted. If the system you want to delete is the
default boot system, you need to select a new default boot system before the system can
be deleted.
system must be unlocked before it can be deleted. If the system you want to delete is the
default boot system, you need to select a new default boot system before the system can
be deleted.
You cannot delete a system version through the Management Console; you must use the
CLI.
CLI.
To delete a system:
At the (config
)
command prompt:
SGOS#(config) installed-systems
SGOS#(config installed-systems) delete system_number
where
system_number
is the system you want to delete.
Disk Reinitialization
You can reinitialize disks on a multi-disk SG
appliance. You cannot reinitialize the disk on
a single-disk SG
appliance. If you suspect a disk fault in a single-disk system, contact Blue
Coat Technical Support for assistance.
Multi-Disk SG Appliances
On a multi-disk SG
appliance, the master disk is the leftmost valid disk. Valid means that
the disk is online, has been properly initialized, and is not marked as invalid or unusable.
If the current master disk is taken offline, reinitialized, or declared invalid or unusable, the
leftmost valid disk that has not been reinitialized since restart becomes the master disk.
Thus, as disks are reinitialized in sequence, a point is reached where no disk can be chosen
as the master. At this point, the current master disk is the last disk. If this disk is taken
offline, reinitialized, or declared invalid or unusable, the SG appliance is restarted.
leftmost valid disk that has not been reinitialized since restart becomes the master disk.
Thus, as disks are reinitialized in sequence, a point is reached where no disk can be chosen
as the master. At this point, the current master disk is the last disk. If this disk is taken
offline, reinitialized, or declared invalid or unusable, the SG appliance is restarted.
On a multi-disk SG
appliance, a disk is reinitialized by setting it to empty and copying
pre-boot programs, boot programs, and starter programs, and system images from the
master disk to the reinitialized disk.
master disk to the reinitialized disk.
Reinitialization is done online without rebooting the system. (For more information, refer
to the
to the
#disk
command in the Volume 11: Command Line Interface Reference.) SGOS
operations, in turn, are not affected, although during the time the disk is being
reinitialized, that disk is not available for caching. Only the master disk reinitialization
restarts the SG
reinitialized, that disk is not available for caching. Only the master disk reinitialization
restarts the SG
appliance.
Only persistent objects are copied to a newly-reinitialized disk. This is usually not a
problem because most of these objects are replicated or mirrored. If the reinitialized disk
contained one copy of these objects (which is lost), another disk contains another copy.
problem because most of these objects are replicated or mirrored. If the reinitialized disk
contained one copy of these objects (which is lost), another disk contains another copy.
You cannot reinitialize all of the SG appliance disks over a very short period of time.
Attempting to reinitialize the last disk in a system before critical components can be
replicated to other disks in the system causes a warning message to appear.
Attempting to reinitialize the last disk in a system before critical components can be
replicated to other disks in the system causes a warning message to appear.
Immediately after reinitialization is complete, the SG appliance automatically starts using
the reinitialized disk for caching.
the reinitialized disk for caching.
Note:
If a disk containing an unmirrored event or access log is reinitialized, the logs are
lost. Similarly, if two disks containing mirrored copies of the logs are reinitialized, both
copies of the logs are lost.
copies of the logs are lost.