User`s guide

$ SHOW DEVICE $3$DUA1/FULL
Disk $3$DUA1: (FRED), device type (type not yet identified), is online, file-
oriented device, shareable, available to cluster, error logging is enabled.
Error count 0 Operations completed 50543
Owner process "" Owner UIC [0,0]
Owner process ID 00000000 Dev Prot S:RWED,O:RWED,G:RWED,W:RWED
Reference count 0 Default buffer size 512
Total blocks 6151059 Sectors per track 57
Total cylinders 2570 Tracks per cylinder 42
Host name "FRED" Host type, avail HSJ4, yes
Allocation class 3
Note in the example that ‘‘Host type’’ indicates an HSJ4 (meaning HSJ40).
The following command line displays the name reported by the controller. In
this example, HSX01 is the device name of $3$DUA1. Use this command line to
determine the controller’s REAL device name even though VMS reports ‘‘type not
yet identified.’’
$ WRITE SYS$OUTPUT F$GETDVI("$3$DUA1","media_name")
HSX01
Refer to the StorageWorks HS Array Controller Operating Firmware Release Notes
for further information.
8.3.5 Using the CLUSTER_SIZE Qualifier for Large Devices or Storagesets
with OpenVMS Systems
Digital recommends that the formula displayed by the OpenVMS operating
system HELP DEVICE INIT/CLUSTER_SIZE command be used to determine the
proper OpenVMS file system cluster size. Using too small of a file system cluster
size may prevent some of the device or storageset capacity from being accessed;
too large of a cluster size usually wastes storage capacity by allocating large
blocks of storage for small files.
8.3.5.1 VAX VMS Version 5.5–1 (and earlier)
If you are using OpenVMS VAX Version 5.5–1 software or earlier, and you are
attempting to initialize a device using the DCL INITIALIZE command (or the
DCL BACKUP/IMAGE command), you will receive the following error message:
Note
The INITIALIZE command may incorrectly set the cluster size.
$ INITIALIZE device-name
"unfavorable cluster size"
This message can be circumvented by using the /CLUSTER_SIZE=n qualifier.
The recommended value of n can be determined by using the following formula:
$ INITIALIZE/CLUSTER_SIZE= number-of-blocks device-name
Operating System Support 8–7