Yes you look at the maximum storage capacity the OS supports. In the case of
the F760, it is 1.4TB.
-----Original Message-----
From: Jason Middlebrooks [mailto:Jason_Middlebrooks@datalink.com]
Sent: Thursday, October 07, 1999 1:37 PM
To: Thompson, Arnold
Cc: Mohler, Jeff; toasters(a)mathworks.com
Subject: RE: Max number of drives.
I am not concerned about mixing the drives in the volume because like drive
will be in there own raidgroup. I am just wondering about the max number
of drives. All the docs say 28 18Gig drives and 56 9Gig drives in a loop.
But what if you have 21 18Gig drives and 14 9Gig drives? Do you look at
the maximum Storage Capacity to determine how many total drive you can have
when you mix them?
Thanks
Jason
"Thompson, Arnold" <arnold.thompson(a)netapp.com> on 10/07/99 03:46:34 PM
To: "Mohler, Jeff" <jeff.mohler(a)netapp.com>, Jason Middlebrooks/Datalink,
toasters(a)mathworks.com
cc:
Subject: RE: Max number of drives.
I recall from mixing 9s and 18s at a customer site that you *can* add the
18s to
an existing volume of 9s and still get 18G worth (minus filesystem
overhead,
snaps, etc.) from each 18G drive. The first 18G drive becomes parity and
the 9G
parity becomes a data drive (so you get 9G additional capacity from the
first
18G drive), but after that you should get 18 and not 9. Historically,
you've
been able to mix and match with the filer doing the right thing. It is
true
that if a 9G drive fails and there is no 9G spare, it will rebuild on an
18G
drive but you will only get 9G on that rebuilt drive. So be sure to have a
spare of each size available. If anybody has tested this with different
results
I could be completely nuts, so please educate us!
It is important to make the 9G shelves the lowest order shelves for FCAL
loop
initialization purposes, so make the 9G shelves numbers 0 and 1.
Regards,
Arnie
> -----Original Message-----
> From: Mohler, Jeff [mailto:jeff.mohler@netapp.com]
> Sent: Thursday, October 07, 1999 11:38 AM
> To: 'Jason Middlebrooks'; toasters(a)mathworks.com
> Subject: RE: Max number of drives.
>
>
> Sure, no problem.
>
> But when you add them to a volume (if you are not creating a
> new one) make sure
> you add them to the volume made up of 18G drives. (That is,
> if the 18G drives
> are a separate volume from the 9G ones).
>
> If you mix/max drive sizes in a volume, the larger drives
> will appear only to be
> the size of the smallest drive in the array.
>
> -----Original Message-----
> From: Jason Middlebrooks [mailto:Jason_Middlebrooks@datalink.com]
> Sent: Thursday, October 07, 1999 12:01 PM
> To: toasters(a)mathworks.com
> Subject: Max number of drives.
>
>
> Question.
>
> I have 14 9Gig drives and 14 18Gig drives. So a total of 28
> drives. Can I
> add 7 more 18Gig drives on the same loop?
>
> The filer is a F760
>
> Thanks in advance
> Jason Middlebrooks
>