Chapter 3 System Preparation152 September 2002 HPSS Installation GuideRelease 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.Refer to Section 6.8.13.5: ADIC Automatic Media Library Storage Systems Information on page 392 formore information.3.5.5 Tape Drive VerificationVerify that the correct number and type of tape devices are available on each Tape Mover node.3.5.5.1 AIXThe tape devices section of the lsnode 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 the lsnode report indicates whether the available tape driveshave variable-length block size set.To manually check whether variable block size is enabled, the following should return avalue of zero(0):% lsattr -E -l -a block_size -F valueTo change the device to use variable block size:root% chdev -l -a block_size=0• If using STK drives (e.g., Redwoods), verify that the drive type is not incorrectly set toGeneric tape drive or IBM Emulation mode.• On each Tape Mover node, verify that the raw read and write I/O performance of all HPSStape drives are at expected levels. Create one or more tables documenting the results.To measure uncompressed write performance (see warning below) on rmt1 (Note thatspecifying rmt1.1 causes the tape not to rewind):% iocheck -w -t 20 -b 1mb /dev/rmt1.1To measure the maximum-compressed write performance on rmt1 (and then rewind thetape):% iocheck -w -t 20 -f 0 -b 1mb /dev/rmt1To measure read performance on drive rmt1 using the previously-written uncompressedand compressed files:
