The ³mod 27² moniker was selected because the 32,760 size was ³roughly²
three times a mod 9. The mod 54 is ³roughly² three times the mod 27. It
would have been too hard to allocate a ³3390 mod 29.43396226415².
You have actual volumes with 32,760 cylinders because they¹ve been defined
that way in your DS8000. If you want 10 cylinder disks, you can probably
have that too. I remember an EMC box I used that gave me (memory¹s bad
here...) 4 mod 9 disks, plus a ³leftover² 110 cylinder disk per physical
volume in the EMC frame. They said to consider the small ones as ³really
fast² dasd for specific purposes.
Some things just need to be taken on faith, and then you move on.
--
.~. Robert P. Nix Mayo Foundation
/V\ RO-OC-1-13 200 First Street SW
/ ( ) \ 507-284-0844 Rochester, MN 55905
^^-^^ -----
"In theory, theory and practice are the same, but
in practice, theory and practice are different."
> From: Marcy Cortes <[EMAIL PROTECTED]>
> Reply-To: The IBM z/VM Operating System <IBMVM@LISTSERV.UARK.EDU>
> Date: Tue, 6 Mar 2007 14:00:38 -0600
> To: <IBMVM@LISTSERV.UARK.EDU>
> Conversation: [IBMVM] DASD cylinders
> Subject: Re: DASD cylinders
>
> How then do I have actual volumes on my system of 32,760 cyls. That's
> not divisible by 1113 (ds8000 here).
>
>
>
>
> Marcy Cortes
>
>
> "This message may contain confidential and/or privileged information.
> If you are not the addressee or authorized to receive this for the
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>
>
> -----Original Message-----
> From: The IBM z/VM Operating System [mailto:[EMAIL PROTECTED] On
> Behalf Of Jim Elliott <[EMAIL PROTECTED]>
> Sent: Tuesday, March 06, 2007 11:55 AM
> To: IBMVM@LISTSERV.UARK.EDU
> Subject: Re: [IBMVM] DASD cylinders
>
>> That's what I think too. Mod 27 and Mod 54 don't exist. I just read
>> the ds8000 doc, you can choose 3390 Standard Mod 3, 3390 Standard Mod
>> 9, or 3390 Custom Volume.
>
> Marcy:
>
>> On the DS8000 family, you can allocate any number of cylinders you
>> want, but they must be in multiples of 1113 (a 3390-1) up to a maximum
>
>> of 60102 cylinders (a 3390-54). Apparently this is different from the
>> ESS where you could have any number of cylinders (up to whatever the
>> limit was).
>
> Jim
