TMF Reference Manual (G06.24+)

TMFCOM Commands
HP NonStop TMF Reference Manual—522418-002
3-44
ALTER AUDITDUMP
BLOCKSIZE {4 | 8 | 12 | 16 | 20 | 24 | 28 | 32 | 36
| 40 | 44 | 48 | 52}
for dumps to tape, sets the tape data block length when multiplied by 1024 bytes.
Using large data block lengths is more efficient, but length is limited by the density
in bits per inch (bpi) at which the tape drive writes tapes. The following are
recommended values:
The originally assigned default is 28.
If you specify a BLOCKSIZE value larger than 28, but the tape drive selected
cannot handle data blocks this long, TMF uses a block size of 28 KB for the dump
and generates a warning message.
RESET BLOCKSIZE
for dumps to tape, resets the value for the tape data block size to the originally
assigned default, which is 28.
COPIES 1 [PARALLEL | SERIES]
COPIES 2 [PARALLEL | SERIES]
COPIES 3 SERIES
for dumps to tape, specifies the number of copies made of each audit dump.
These copies can be produced in parallel or series. Specifying multiple copies is
recommended so that file recovery is still possible if one of the copies cannot be
read.
PARALLEL
produces copies of the audit dump simultaneously on two tape drives. To
request this option, you must have two tape drives available. If you specify two
node names in the SYSTEM parameter, TMF uses one tape drive on each
node.
SERIES
produces copies of the audit dump, one at a time. Select this option if you
want to make multiple copies of audit dumps using a single tape drive. TMF
reads the audit-trail file on disk once for each serial copy produced; thus, this
option can adversely affect the performance of a busy system.
Density (bpi) 800 1600 6250
BLOCKSIZE 4 8 28
Note. For this and other optional parameters, the originally assigned default is the value
initially assigned to the parameter by TMF. The originally assigned default is used for the
parameter when no one has explicitly specified or altered this parameter’s value in a
previous command. For more information about how defaults are assigned, see Usage
Guidelines.