RE: i5 External Disk Questions

12 arms over 3 TB - that might be a bit slow for some intensive I/O, if
you weren't able to utilize the cache effectively on that 2780.

Speaking of cache - best make for absolute certain you get the cache
backup card - losing nearly 1 GB of cached data means you're rebuilding
your box from tape.  =)

--
Justin C. Haase - iSeries System Engineer
IBM Certified Systems Expert - eServer i5
Kingland Systems Corporation

-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Jones, John (US)
Sent: Friday, December 30, 2005 3:14 PM
To: Midrange Systems Technical Discussion
Subject: RE: i5 External Disk Questions

Actually, you can get 300GB 10K disks (FC 3578) in a 5xx box or an 0595
rack.  12 of those + a 2780 + an 0595 shouldn't be that expensive &
would add 3TB after RAID5.

--
John A. Jones, CISSP
Americas Information Security Officer
Jones Lang LaSalle, Inc.
V: +1-630-455-2787  F: +1-312-601-1782
john.jones@xxxxxxxxxx

-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Bryan Dietz
Sent: Friday, December 30, 2005 2:52 PM
To: Midrange Systems Technical Discussion
Subject: Re: i5 External Disk Questions

Wayne,
FastT is not an option on the 400.  If you want IBM external disk you
have to go with the "shark"[1] type.  Very expensive.
I am not sure what the other two are, but I doubt they will connect.

If it is purely archieval then maybe you look into optical storage[2]

You can now attach 140gb drives maybe that will work too.

Good Luck



[1] http://www-03.ibm.com/servers/eserver/iseries/storage/disk3.html
[2] http://www-03.ibm.com/servers/eserver/iseries/optical/
_____________________________
Bryan Dietz
Aktion Associates


midrange-l-bounces@xxxxxxxxxxxx wrote on 12/30/2005 02:42:25 PM:

> Does anyone use external Disk?  I'm finding that I need to add a 
> tremendous amount of disk for an archive function.  Internal disk 
> works great, but it's way more expensive than I can justify.
>
> My vendor says they have used FASTT / EXP400 and JETSTORE, But I don't

> know anything about any of these.  One of my coworkers has spected out

> an Xserver RAID solution from Apple Store.
>
> What do I need to look at.  What are the 'gotchas'.  I know I saw 
> somewhere where there is a external disk 'problem' between i5s and 
> fiber attached disks of certain kinds.  I just don't remember where I 
> saw this information.
>
> Any input to increase my limited knowledge would be much appreciated.
>
> Thanks
> Wayne Johnston

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