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Service manuals and repair information about laser, dot matrix, label printer and ink jet printers of different makes: HP, Canon, Epson, Ricoh, Star, Xerox, Okidata

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Using hwmgr Replacing a SCSI Disk To replace a disk (for example, a disk that fails) so that the replacement disk takes on the hardware characteristics of the failed disk, such as ownership of the same device special files, use the hwmgr -redirect scsi command. Example 6-8 Replacing a Failed SCSI Disk # hwmgr -show scsi SCSI DEVICE DEVICE DRIVER NUM DEVICE FIRST HWID: DEVICEID HOSTNAME TYPE SUBTYPE OWNER PATH FILE VALID PATH ---------------------------------------------------------------------30: 0 canary disk none 2 1 dsk0 [0/0/0] . . . . . . . . . 36: 6 canary disk none 0 1 dsk5 [1/3/0] 37: 7 canary disk none 0 1 dsk6 [1/4/0] 41: 8 canary disk none 0 1 dsk8 [1/5/0] # hwmgr -redirect scsi -src 7 -dest 8 hwmgr: Redirect operation was successful # hwmgr -show scsi SCSI DEVICE DEVICE DRIVER NUM DEVICE FIRST HWID: DEVICEID HOSTNAME TYPE SUBTYPE OWNER PATH FILE VALID PATH ---------------------------------------------------------------------30: 0 canary disk none 2 1 dsk0 [0/0/0] . . . . . . . . . 36: 6 canary disk none 0 1 dsk5 [1/3/0] 37: 7 canary disk none 0 1 dsk6 [1/5/0] # hwmgr -scan scsi hwmgr: Scan request successfully initiated # hwmgr -show scsi SCSI DEVICE DEVICE DRIVER NUM DEVICE FIRST HWID: DEVICEID HOSTNAME TYPE SUBTYPE OWNER PATH FILE VALID PATH ---------------------------------------------------------------------30: 0 canary disk none 2 1 dsk0 [0/0/0] . . . . . . . . . 36: 6 canary disk none 0 1 dsk5 [1/3/0] 37: 7 canary disk none 0 1 dsk6 [1/5/0] 42: 8 canary disk none 0 1 dsk9 [1/4/0] # 1. Use hwmgr -show scsi to display SCSI devices. 2. Replace dsk6 (failing disk with DID = 7) with spare disk dsk8 (DID = 8). You should have a backup copy of dsk6. 3. Verify that the hardware characteristics of disk dsk6 have been given to the disk at bus/target/LUN 1/5/0. You can now restore to dsk6 from your backup copy. 4. When convenient, physically replace the failed disk at bus/target/LUN 1/4/0 with a new disk and use hwmgr -scan scsi to register it. 6 30 Managing Disks Creating a User-Defined SCSI Device Name Some older disk devices do not provide a unique WWID. For such disks, the system will create a WWID using valid path bus/target/lun data. If the disk is shared in a cluster, each system creates its own unique WWID, leading to the possibility of concurrent access and data corruption. You can use hwmgr to create a unique user-defined name for the older disk which is then used by each system to create a common WWID and one set of device special file names for the disk. Example 6-9 Creating a User-Defined SCSI Device Name # hwmgr -show scsi -did 8 -full SCSI DEVICE DEVICE DRIVER NUM DEVICE FIRST HWID: DEVICEID HOSTNAME TYPE SUBTYPE OWNER PATH FILE VALID PATH ---------------------------------------------------------------------42: 8 canary disk none 0 1 dsk9 [1/4/0] WWID:0410003a:"DEC HDA=000041563084" RZ28 (C) DECPCB=ZG52462664 ; BUS TARGET LUN PATH STATE -----------------------------1 4 0 valid # hwmgr -edit scsi -did 8 -uwwid "test d

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