Technical data

Managing Peripheral Devices
8.2 Getting Information About Devices on the System
8.2.1 Determining If Volumes Need Rebuilding
If a volume was improperly dismounted, it may require rebuilding. Volumes
are improperly dismounted when, for example, the system crashes. Use the
/REBUILD_STATUS qualifier with the SHOW DEVICES command to determine
if a volume needs rebuilding. Do not use the /REBUILD_STATUS qualifier with
any other SHOW DEVICES qualifiers, except the /OUTPUT qualifier.
For each volume, SHOW DEVICES/REBUILD_STATUS returns one of the
following values:
Value Meaning
Yes Rebuild needed
No Rebuild not needed
Not applicable The volume cannot be rebuilt; the volume is not a disk or
the volume is write-locked
Information unavailable Rebuild information is not available; the volume is not
mounted or mount verification is taking place
Do either of the following steps to rebuild a volume:
• Use SET VOLUME/REBUILD
• Dismount the volume and then mount the volume again using
MOUNT/REBUILD
Device EMUL$DKB500, in the following example, needs rebuilding.
$ SHOW DEVICES/REBUILD_STATUS
Device Name Rebuild needed?
ADU15$DKA300: Information unavailable
EDIV$DKA300: Information unavailable
EMUL$DKB200: No
EMUL$DKB300: No
EMUL$DKB500: Yes
FTA0: Not applicable
OPA0: Not applicable
8.2.2 Getting Information About ISO 9660-Formatted Devices
You can use the SHOW DEVICE command to retrieve information about ISO
9660-formatted devices. The following example illustrates the use of the SHOW
DEVICES/FULL command to obtain information about an ISO 9660-formatted
CD–ROM. Note that the ACP process name is given and that the volume status
is listed as ISO 9660. The display tells the user that the mounted members of the
volume set are relative volume numbers (RVN) 1, 64, and 65535.
$ SHOW DEVICE DKA1/FULL
Disk $1$DKA1: (VMSRMS), device type RRD40, is online, allocated,
deallocate on dismount, mounted, software write-locked, file-oriented
device, shareable, served to cluster via MSCP Server.
Error count 0 Operations completed 9
Owner process "_FTA5:" Owner UIC [FIN,USER]
Owner process ID 20200066 Dev Prot S:RWPL,O:RWPL,G:R,W
Reference count 2 Default buffer size 512
Total blocks 256 Sectors per track 32
Total cylinders 1 Tracks per cylinder 8
Allocation class 1
Managing Peripheral Devices 8–5