Sun Microsystems StorageTek T10000, Руководство оператора

Страница: 34 / 120

T10000 Cartridges
32 T10000 Operator’s Guide • July 2008 Revision EA • 96174
Note – When the T10000A&B drive identifies the data cartridge as an unreadable-
density data format, it displays 3215 on the Virtual Operator Panel (VOP) or the
physical operator panel of the rack mount drive.
Invalid Media Information Conditions
There are four media invalid conditions for the T10000A/B drives:
■
If the cartridge's RFID is unreadable, the drive will refuse to mount the cartridge
with an FSC of 403B. The cartridge must be returned to engineering to recover the
customer data.
■
If the cartridge's RFID can be partially read, the drive will mount the cartridge as
read-only.
■
If the RFID and MIR are out-of-sync, none of the block information, coarse-grained
in the RFID or fine-grained in the MIR, can be trusted. The cartridge is usable but
since none of the block information is trusted it is rebuilt as the drive sequentially
reads all of the data up to the desired customer data.
Note – This scenario can cause the drive to spend an hour or more rebuilding the block
information, potentially causing the application running on the host to time-out.
■
If the MIR is corrupted or unreadable, the fine-grained block location information on
the cartridge cannot be used; the tape can be used with the coarse-grained block
information on the RFID but with lower performance.
The T10000A/B drive posts a 4031/4032 informational FSC whenever a cartridge with
an invalid MIR is loaded.
Once a tape cartridge has invalid media information, some action is required to correct
it. Invalid media information can be corrected in several ways:
■
Run the media correction utility through the VOP (see “Rebuilding an MIR” on
page 48 ).
■
The drive itself will recover the media information as it processes host commands,
but very slowly.