Can an OIS41 hard drive RZ28 dka200 be used to replace a failed dka300 hard drive?
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What type of box are you putting it in and what operating system?
Yes, typically readdressing the SCSI drive to address 3 makes it appear as the dka300 drive. If you use the proper VMS tape restore command line, it should overwrite the disk. The OISnn File Utilities manuals, under software backup and restore, spell out the command lines on how to backup and restore from a tape. Disks are usually DKA or DKB devices and tape drives are MKA or MKB devices followed by the address (i.e 5 =500). The A and B are different SCSI channels. Typically A channel for everything you need. Since it has a DKA300: it probably is a OIS42. If the operating system disk is DKA200:, then you may be able to skip boot minimal to VMS. It would require a DISMOUNT if the disk is already mounted and then a mount/foreign. Typically, you need to shutdown and connect the tape drive (if it isn't already) and then boot.
When it powers up or I believe the halt button will force interrogation of devices and it will list the devices it finds on interrogation and load the drivers for those devices.
Typically boot minimal to VMS from the ROM drive operating system disk. Need to know the Rom drive device name and have the CD-Rom
BOOT -FL E,0 boot_device (DKA600 or 400/700)
Then use commands like
MOUNT/FOREIGN tape: (MKA500 usually, tape drive mount of tape)
MOUNT/FOREIGN disk: (DKA300, after it is readdressed)
BACKUP/VERIFY/IMAGE/REWIND MKA500:name.ext/SAVE_SET disk: (make sure the FROM and TO are in the correct order FROM tape TO disk
If you don't know the saveset name.ext, you can mount the tape: MOUNT MKA500:, then do a DIR MKA500: and it will list the file names on the tape. It will take a little while to run through the tape.