HPUX : Checking and adapting the speed of Disk of DS2120.

Checking and adapting the speed of Disk of DS2120.

Overview

Checking and adapting the speed of Disk of DS2120.

Procedures

1. As per the shared logs, no issues found with the DS2120. Also, reviewing the disk failure history, I could see that three of them failed due to bad media and the 4th with a hard failure. The medium errors are not related to any HBA or chassis hardware issues. 2. Checking the SCSI adapter settings, it is found that we are using U320 SCSI speed for mpt8 and mpt14. Please refer the advisory ---- ADAPTER INFORMATION ----------------------------------------------------- Device File                   : /dev/mpt8 Hardware Path                 : 1/0/0/2/0 ---- BUS PARAMETERS ---------------------------------------------------------- Initiator SCSI ID             : 7  SCSI Bus Rate                 : Ultra320     SCSI Bus Width                : Wide        ---- CHANNEL CAPABILITIES ---------------------------------------------------- Req/Ack Offset                : 127          Bus Mode                      : LVD          Quick Arbitration Selection   : Disabled     DT Clocking                   : Enabled      Packetized                    : Enabled     ---- TARGET PARAMETERS ------------------------------------------------------- Target   Description        Firmware  In Use     In Use    Id                        Version   Rate       Width ------------------------------------------------------------------------------     6     ST373455LC         HPC8      Ultra320   Wide      . . . . ---- ADAPTER INFORMATION ----------------------------------------------------- Device File                   : /dev/mpt14 Hardware Path                 : 1/0/6/1/0 ---- BUS PARAMETERS ---------------------------------------------------------- Initiator SCSI ID             : 7  SCSI Bus Rate                 : Ultra320     SCSI Bus Width                : Wide        ---- CHANNEL CAPABILITIES ---------------------------------------------------- Req/Ack Offset                : 127          Bus Mode                      : LVD          Quick Arbitration Selection   : Disabled     DT Clocking                   : Enabled       Packetized                    : Enabled     ---- TARGET PARAMETERS ------------------------------------------------------- Target   Description        Firmware  In Use     In Use    Id                        Version   Rate       Width ------------------------------------------------------------------------------     8     ST373454LC         HPC3      Ultra320   Wide         10     ST373455LC         HPC8      Ultra320   Wide      This is unsupported for a DS2120 . Please correct this (set the speed to 160) as below: #mptconfig –r ultra160 /dev/mpt8   >>> Setting speed to 160 Confirm with “y” #mptconfig /dev/mpt8  >>> check the “Rate in use” for the devices Repeat the same with /dev/mpt14

Keywords.

mptconfig