From: Spammers Must Die (wsanders1@yahoo.com)
Date: Thu Feb 13 2003 - 13:54:50 EST
I have a nearly-3-yr-old E450 loaded with 15 SUN18G drives that appear
to be IBM Ultrastar DDYS-T18350. I have had 6 of these 15 disks fail
under warranty in the past few weeks. This is a system I have just
begun to work on as a contractor; its past history is totally unknown.
OS is Sol 2.6, patch levels OK. The system is located 450 miles away
from me, so it's hard for me to look at the system.
My question is, the product literature says these drives are
10Krpm. Output from format and iostat -En says otherwise, and the block
count given by the device inquiry is slightly smaller than the
published
literature:
c3t3d0 Soft Errors: 2 Hard Errors: 164 Transport Errors: 3
Vendor: IBM Product: DDYST1835SUN18G Revision: S94N Serial No:
00371G0958
RPM: 7200 Heads: 19 Size: 18.11GB <18110967808 bytes>
Media Error: 157 Device Not Ready: 0 No Device: 7 Recoverable: 2
Illegal Request: 0 Predictive Failure Analysis: 0
format>
Primary label contents:
Volume name = < >
ascii name = <SUN18G cyl 7506 alt 2 hd 19 sec 248>
pcyl = 7508
ncyl = 7506
acyl = 2
nhead = 19
nsect = 248
Part Tag Flag Cylinders Size Blocks
0 unassigned wm 0 - 2 6.90MB (3/0/0)
14136
1 unassigned wu 0 0 (0/0/0)
0
2 backup wu 0 - 7505 16.86GB (7506/0/0)
35368272
3 unassigned wm 0 0 (0/0/0)
0
4 unassigned wm 0 0 (0/0/0)
0
5 unassigned wm 0 0 (0/0/0)
0
6 usr wm 3 - 7505 16.86GB (7503/0/0)
35354136
7 unassigned wm 0 0 (0/0/0)
0
For example, iostat says 7200RPM, product literature says 10000RPM.
Drive says 35368272 blocks with 7505 ncyl, literature says 35843670
blocks, 14854 ncyl.
Could the all the disk errors I am getting from these drives be due to
discrepancies in the disk info on the label? Like, if someone did a dd
from a different kind of drive starting at block 0, from another kind
of drive? My initial answer - I doubt it. Or perhaps the discrepancies
are due to the usual firmware tweaking Sun does on their drives? My
initial answer- more likely. There is no entry for this drive in
format.dat on Sol 2.7 or 2.8 systems, so my guess is a format.dat entry
is unnecessary.
My usual response to a disk error is to just slap in another one, but
the nearly simultaneous failure of 6 disks has me suspicious that
something else is going on.
Maybe these are just a model of disk that all die after three years.
I've seen this happen, but not to more recent Sun drives.
Thanks in advance,
-Wiley Sanders
http://www.wsanders.net
Yahoo! Shopping - Send Flowers for Valentine's Day
http://shopping.yahoo.com
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