I asked a similar question and it should be in the archives.
Basically the response was:
If a Storage Group contains a mix of SSD and HDD volumes, to divert datasets
on HDD volumes,assign them a
Storage Class with these attributes:
DIRECT MSR = 1
DIRECT BIAS = R
Do not specify any values for SEQUENTIAL MSR or
BIAS. *
To direct storage allocation away from SSD, specify a DataClass with:
DIRECT MSR = 10
DIRECT BIAS = R
In case of HSM restore, dataset will be allocated depending on its SMS
attributes.
https://listserv.ua.edu/cgi-bin/wa?A2=IBM-MAIN;62ffddc2.1307
Or the thread subject:
Dataset Allocation in SMS with Mixed Devices
Lizette
> -----Original Message-----
> From: IBM Mainframe Discussion List [mailto:[email protected]] On
> Behalf Of R.S.
> Sent: Thursday, March 06, 2014 12:36 AM
> To: [email protected]
> Subject: Re: SSD in DFSMS
>
> Yes, I mean Solid State Drive.
>
>
>
> --
> Radoslaw Skorupka
> Lodz, Poland
>
>
>
>
>
>
>
> W dniu 2014-03-06 02:35, Lizette Koehler pisze:
> > Are you asking about solid state dasd or some other item?
> >
> > Lizette
> >
> >
> >> -----Original Message-----
> >> From: IBM Mainframe Discussion List [mailto:[email protected]]
> On
> >> Behalf Of R.S.
> >> Sent: Wednesday, March 05, 2014 12:24 PM
> >> To: [email protected]
> >> Subject: SSD in DFSMS
> >>
> >> z/OS 1.13
> >>
> >> AFAIK, IBM provides some interface that allow to choose SSD in DFSMS
> > routines.
> >> Actually the only information I found is MSR parameter in Storage
Class. I
> > would
> >> like to read more about it, maybe some examples of implementations.
> >>
> >> Where can I find more information about DFSMS and SSD ?
> >>
> >> --
> >> Radoslaw Skorupka
> >> Lodz, Poland
> >>
> >>
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