Largest physical volume addressed in MPE (202 Views)
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Honored Contributor
Vincent Farrugia
Posts: 1,675
Registered: ‎08-13-2001
Message 1 of 5 (202 Views)
Accepted Solution

Largest physical volume addressed in MPE

Hello,

We are going to connect a HASS array to a 979KS server soon. We want to know what is the largest physical volume that can be created in MPE. We were told that this is in the range of 4Gb, but we're not sure. If this is the case, how can the HASS array be configured if we have multiple disks the size of 18Gb in it?

Thanks in advance,
Vince
Tape Drives RULE!!!
Trusted Contributor
Ian Warner
Posts: 178
Registered: ‎12-04-1997
Message 2 of 5 (202 Views)

Re: Largest physical volume addressed in MPE

The 4 gig limit is for ldev 1 only. The rest of the drives can be as large as you can afford.

Ian
Why did anyone invent unix?
Trusted Contributor
Ian Warner
Posts: 178
Registered: ‎12-04-1997
Message 3 of 5 (202 Views)

Re: Largest physical volume addressed in MPE

PS. A drive larger than 4 gig can be used as ldev1, but only the first 4 gig is used, wasting the rest.

Ian
Why did anyone invent unix?
Honored Contributor
Vincent Farrugia
Posts: 1,675
Registered: ‎08-13-2001
Message 4 of 5 (202 Views)

Re: Largest physical volume addressed in MPE

Hello,

Thanks for the reply. I don't know anything about MPE, so please could you tell me what ldev 1 is?

Thanks, points will be assigned later.

Vince
Tape Drives RULE!!!
Trusted Contributor
Ian Warner
Posts: 178
Registered: ‎12-04-1997
Message 5 of 5 (202 Views)

Re: Largest physical volume addressed in MPE

Ldev 1 is the disk that the MPE operating system is loaded onto. It is accessed as part of the MPEXL_SYSTEM_VOLUME_SET
which is configured for spooling, transient space etc.
You can add all drives to this volume set, have a minimum of 1 drive in it or any combination you care. Any other drives can be added to a Private volume set that you can configure. All users access the system volume set but you can manually configure what has access to the private volume set.

HTH
Ian
Why did anyone invent unix?
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