We have EXN3000 (IBM rebranded DS4243's) disk shelves and recently had a PSU go out on one. In attempting to perform the hot swap, we discovered we didn't have enough clearance to pull the PSU out without hitting our vertically mounted CDU's (PDU -- our datacenter team prefers to call them cabinet distribution units). We had to actually lift the CDU off its mount and hold it away from the cabinet to gain the necessary clearance to pull the PSU free. While everything was still running. Definitely precarious!
Turns out our racks are 42" deep and I *believe* the recommendation from NetApp is to have 48" racks -- probably exactly for this reason. Can anyone confirm?
Other ways to potentially deal with this? I suppose using horizontal CDU's could work as well.
Thanks, Ray
On Fri, Jul 26, 2013 at 06:21:54PM -0700, Ray Van Dolson wrote:
Turns out our racks are 42" deep and I *believe* the recommendation from NetApp is to have 48" racks -- probably exactly for this reason. Can anyone confirm?
Other ways to potentially deal with this? I suppose using horizontal CDU's could work as well.
There are extra wide racks that enable the PDUs to be mounted outside of the 19" mounting brackets. We have some from APC and some from Ericson and they both leave the full 19" width clear of the PDUs and power cords.
Even with the extra deep racks, you can run into issues pulling out system boards and IOXMs since they are nearly the full 19" wide.
John
On Fri, Jul 26, 2013 at 06:59:21PM -0700, John Clear wrote:
On Fri, Jul 26, 2013 at 06:21:54PM -0700, Ray Van Dolson wrote:
Turns out our racks are 42" deep and I *believe* the recommendation from NetApp is to have 48" racks -- probably exactly for this reason. Can anyone confirm?
Other ways to potentially deal with this? I suppose using horizontal CDU's could work as well.
There are extra wide racks that enable the PDUs to be mounted outside of the 19" mounting brackets. We have some from APC and some from Ericson and they both leave the full 19" width clear of the PDUs and power cords.
Even with the extra deep racks, you can run into issues pulling out system boards and IOXMs since they are nearly the full 19" wide.
John
Happen to know the models of those racks?
Ray
On Fri, Jul 26, 2013 at 07:03:14PM -0700, Ray Van Dolson wrote:
On Fri, Jul 26, 2013 at 06:59:21PM -0700, John Clear wrote:
There are extra wide racks that enable the PDUs to be mounted outside of the 19" mounting brackets. We have some from APC and some from Ericson and they both leave the full 19" width clear of the PDUs and power cords.
Happen to know the models of those racks?
I think what we have is:
http://www.apc.com/products/resource/include/techspec_index.cfm?base_sku=AR2...
APC lists several with widths of 750mm or 800mm.
John
just wanted to point out that when you do swap the pdu, you have 2m to reinsert the new psu before the system will shut down.
________________________________________ From: toasters-bounces@teaparty.net [toasters-bounces@teaparty.net] on behalf of John Clear [jac@panix.com] Sent: Friday, July 26, 2013 11:07 PM To: Ray Van Dolson Cc: toasters@teaparty.net Subject: Re: EXN3000/DS4243 PSU replacement clearance issues
On Fri, Jul 26, 2013 at 07:03:14PM -0700, Ray Van Dolson wrote:
On Fri, Jul 26, 2013 at 06:59:21PM -0700, John Clear wrote:
There are extra wide racks that enable the PDUs to be mounted outside of the 19" mounting brackets. We have some from APC and some from Ericson and they both leave the full 19" width clear of the PDUs and power cords.
Happen to know the models of those racks?
I think what we have is:
http://www.apc.com/products/resource/include/techspec_index.cfm?base_sku=AR2...
APC lists several with widths of 750mm or 800mm.
John _______________________________________________ Toasters mailing list Toasters@teaparty.net http://www.teaparty.net/mailman/listinfo/toasters
And if you see that you won't make it, re-insert the broken one. That stops the 2 minutes countdown also...
sent from my smartphone, please excuse typos... On Jul 27, 2013 5:49 AM, "Jordan Slingerland" < Jordan.Slingerland@independenthealth.com> wrote:
just wanted to point out that when you do swap the pdu, you have 2m to reinsert the new psu before the system will shut down.
From: toasters-bounces@teaparty.net [toasters-bounces@teaparty.net] on behalf of John Clear [jac@panix.com] Sent: Friday, July 26, 2013 11:07 PM To: Ray Van Dolson Cc: toasters@teaparty.net Subject: Re: EXN3000/DS4243 PSU replacement clearance issues
On Fri, Jul 26, 2013 at 07:03:14PM -0700, Ray Van Dolson wrote:
On Fri, Jul 26, 2013 at 06:59:21PM -0700, John Clear wrote:
There are extra wide racks that enable the PDUs to be mounted outside of the 19" mounting brackets. We have some from APC and some from Ericson and they both leave the full 19" width clear of the PDUs and power cords.
Happen to know the models of those racks?
I think what we have is:
http://www.apc.com/products/resource/include/techspec_index.cfm?base_sku=AR2...
APC lists several with widths of 750mm or 800mm.
John _______________________________________________ Toasters mailing list Toasters@teaparty.net http://www.teaparty.net/mailman/listinfo/toasters
Toasters mailing list Toasters@teaparty.net http://www.teaparty.net/mailman/listinfo/toasters
Ray,
As an ASE I run into this all the time.
The most ingenious solution I have seen was to mount the PDU's on hinges so they swing out of the way when you have to work on them.
Regards
Duncan Cummings NetApp Specialist Interactive Pty Ltd Telephone 07 3323 0800 Facsimile 07 3323 0899 Mobile 0403 383 050 www.interactive.com.au
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-----Original Message----- From: toasters-bounces@teaparty.net [mailto:toasters-bounces@teaparty.net] On Behalf Of Ray Van Dolson Sent: Saturday, 27 July 2013 11:22 AM To: toasters@teaparty.net Subject: EXN3000/DS4243 PSU replacement clearance issues
We have EXN3000 (IBM rebranded DS4243's) disk shelves and recently had a PSU go out on one. In attempting to perform the hot swap, we discovered we didn't have enough clearance to pull the PSU out without hitting our vertically mounted CDU's (PDU -- our datacenter team prefers to call them cabinet distribution units). We had to actually lift the CDU off its mount and hold it away from the cabinet to gain the necessary clearance to pull the PSU free. While everything was still running. Definitely precarious!
Turns out our racks are 42" deep and I *believe* the recommendation from NetApp is to have 48" racks -- probably exactly for this reason. Can anyone confirm?
Other ways to potentially deal with this? I suppose using horizontal CDU's could work as well.
Thanks, Ray _______________________________________________ Toasters mailing list Toasters@teaparty.net http://www.teaparty.net/mailman/listinfo/toasters
-
Duncan Cummings -
John Clear -
Jordan Slingerland -
Ray Van Dolson -
Sebastian P. Goetze