Chapter 3 System Preparation
152 September 2002 HPSS Installation Guide
Release 4.5, Revision 2
• If using an AML PVR, configure the Insert/Eject ports using the configuration files/var/
hpss/etc/AML_EjectPort.conf and/var/hpss/etc/AML_InsertPort.conf.
Referto Section 6.8.13.5: ADIC Automatic Media Library Storage Systems Information on page 392 for
more information.
3.5.5 Tape Drive Verification
Verify that the correct number and type of tape devices are available on each Tape Mover node.
3.5.5.1 AIX
The tape devices section of thelsnode report displays all available tape drives.
To manually find out the type and number of available tape devices:
% lsdev -C -S a -c tape
• On each Tape Mover node, verify that each tape drive has variable-length block size set.
The tape devices section of thelsnode report indicates whether the available tape drives
have variable-length block size set.
To manually check whether variable block size is enabled, the following should return a
value of zero(0):
% lsattr -E -l <tapeDevice> -a block_size -F value
To change the device to use variable block size:
root% chdev -l <tapeDevice> -a block_size=0
• If using STK drives (e.g., Redwoods), verify that the drive type is not incorrectly set to
Generic tape drive or IBM Emulation mode.
• Oneach Tape Mover node, verify that the raw read and write I/O performance of all HPSS
tape drives are at expected levels. Create one or more tables documenting the results.
To measure uncompressed write performance (see warning below) onrmt1 (Note that
specifyingrmt1.1 causes the tape not to rewind):
% iocheck -w -t 20 -b 1mb /dev/rmt1.1
To measure the maximum-compressed write performance onrmt1 (and then rewind the
tape):
% iocheck -w -t 20 -f 0 -b 1mb /dev/rmt1
To measure read performance on drivermt1 using the previously-written uncompressed
and compressed files: