nanog mailing list archives
Re: What to expect after a cooling failure
From: "Tri Tran" <tritran () cox net>
Date: Wed, 10 Jul 2013 05:56:07 +0000
I have seen DDR2 RAM give random errors from inadequate cooling. The cabinets were stacked to the max with severs but the doors were not meshed. DDR2 run fairly hot, especially when all the banks are filled. Tri Tran -----Original Message----- From: Jay Ashworth <jra () baylink com> Date: Wed, 10 Jul 2013 00:04:23 To: NANOG<nanog () nanog org> Subject: Re: What to expect after a cooling failure ----- Original Message -----
From: "Erik Levinson" <erik.levinson () uberflip com>
For those who have gone through such events in the past, what can one expect in terms of long-term impact...should we expect some premature component failures? Does anyone have any stats to share?
If the HDDs were spinning while above rated maximum ambient intake temp, *especially* if they're not *right out front in the intake path* (is anything not built that way anymore? Yeah; the back side of 45-drive Supermicro racks, among other things), you should probably plan on doing a preemptive replacement cycle, or at the very least, pay *very* close attention to smartctld, and have a good stock of pre-trayed replacements. Remember that you may fall in the RAID Hole if you wait for failures, and hence lose data which isn't backed up anyway -- if more drives in a raid group fail *during rebuilds*, you're essentially screwed. If your raid groups were properly dispersed across drive build dates, then this will probably be *slightly* less dangerous, but still. Also watch bearing-type fans. Cheers, -- jra -- Jay R. Ashworth Baylink jra () baylink com Designer The Things I Think RFC 2100 Ashworth & Associates http://baylink.pitas.com 2000 Land Rover DII St Petersburg FL USA #natog +1 727 647 1274
Current thread:
- What to expect after a cooling failure Erik Levinson (Jul 09)
- Re: What to expect after a cooling failure Bryan Tong (Jul 09)
- Re: What to expect after a cooling failure Erik Levinson (Jul 09)
- Re: What to expect after a cooling failure Jay Ashworth (Jul 09)
- Re: What to expect after a cooling failure Jimmy Hess (Jul 09)
- Re: What to expect after a cooling failure Bryan Tong (Jul 09)
- Re: What to expect after a cooling failure Jake Khuon (Jul 09)
- Re: What to expect after a cooling failure Mikael Abrahamsson (Jul 09)
- Message not available
- Re: What to expect after a cooling failure Tri Tran (Jul 09)
- Re: What to expect after a cooling failure Bryan Tong (Jul 09)
- Re: What to expect after a cooling failure Stefan Förster (Jul 09)
- Re: What to expect after a cooling failure George Herbert (Jul 10)
- RE: What to expect after a cooling failure Lorell Hathcock (Jul 10)
- Re: What to expect after a cooling failure Daniel Taylor (Jul 10)
- RE: What to expect after a cooling failure Tony Patti (Jul 10)
- <Possible follow-ups>
- Re: What to expect after a cooling failure Larry Sheldon (Jul 09)
- Re: What to expect after a cooling failure Johnny Eriksson (Jul 09)