Owner's manual

Logging off of the VLS GUI

To logoff theVLS GUI, closethe browserwindow.

NOTE:

The VLS GUI will time-out if unused for one hour.

Understanding how dynamic tape devices work

As explained previously, Dynamic Tape devices contract and expand to accommoda te the size of

aspeciﬁc backup job.

When your backup soft ware starts a job, it mounts the Dynamic Tape device as if it were a physical

tape, and then begins the backup process by launching a Write operation. During this process, if the

tape position in the backup software corresponds to a logical-block address (LBA) that is less than 3, the

software treats the device as though it were overwriting a tape, and the VLS reduces the capacity of the

device to 1 GB. The appliance then releases the unused storage back into a virtual storage-pool (VSP).

When the backup soft ware reaches an early warning (EW) state (EW is reached when less than

100 MB of space remains on the current device), the VLS reviews the following to determine whether

can expand the size of the device:

1. It determines how much space is a lready consumed.

• If the current consumption exceeds 70 percent of the VSP, the appliance sends a “warning”

message to the E-mail address speciﬁed for a lerts.

• If the current consumption excee d s 90 p ercent of the VSP, the appliance sends a “critical”

message to the E-mail address speciﬁed for a lerts.

2. It determines whether you speciﬁed a maximum size for the device.

•If a maximum size is speciﬁed (either by using the default value of 200 GB or setting a

different value), the appliance determines whether expanding the size of the tape by 1 GB

would exceed the speciﬁed capacity.

• If the expansion would not exceed the limit, the appliance increases the size of the tape by

GB. If the expansion is successful, an EW is not reported to the backup software. If the

expansion is unsuccessful, the EW is relayed to the backup software.

• If the expansion would exceed the limit, an EW is relayed to the backup software.

•If you speciﬁed the full capacity of the VSP, the appliance attempts to expand the size of the

tape in 1 GB increments until the full capacity is reached. The tape full VSP tape size can

only be reached if the size is set to the full VSP.

Checking communication with other appliances or systems

The Maintenance page includes a section that lets you check network connectivity with any system,

appliance, passthrough device, or other device that has an I P address. The VLS GUI uses a ping

command

to perform this check.

1. On the Support tab under Maintenance, click Ping Host. In the Ping Host IP Address pane (see Figure

46), type the IP a ddress of the system that you want to check, and click Ping.

HP StorageWorks 1000i Virtual Library System