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Date:      Tue, 27 Feb 1996 00:06:09 -0500 (EST)
From:      Brian Tao <taob@io.org>
To:        FREEBSD-HACKERS-L <freebsd-hackers@freebsd.org>
Subject:   SCSI error code 83 and 84, medium errors
Message-ID:  <Pine.BSF.3.91.960226232956.3793F-100000@zip.io.org>

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    I just started getting these kernel messages today on my 2.1.0R
news server.  They appear in bunches of five, with the "retries"
counter starting at 4, counting down to 1 and ending with "FAILURE".

sd8(ncr2:2:0): error code 83
sd8(ncr2:2:0): error code 84
sd8(ncr2:2:0): MEDIUM ERROR info:1af3b csi:73,0,31,0 asc:68,0
sd8(ncr2:2:0): MEDIUM ERROR info:1af3b asc:11,0 Unrecovered read error field replaceable unit: 2
sd8(ncr2:2:0): MEDIUM ERROR info:1af3b asc:14,1 Record not found field replaceable unit: 2


    Output of 'scsi -f /dev/sd8 -P 0 -m 1':

AWRE (Auto Write Reallocation Enbld):  0
ARRE (Auto Read Reallocation Enbld):  0
TB (Transfer Block):  0
RC (Read Continuous):  0
EER (Enable Early Recovery):  0
PER (Post Error):  0
DTE (Disable Transfer on Error):  0
DCR (Disable Correction):  0
Read Retry Count:  32
Correction Span:  22
Head Offset Count:  0
Data Strobe Offset Count:  0
Write Retry Count:  32
Recovery Time Limit:  65535


    I turned on AWRE and ARRE, but the problem persisted.  It seems to
have gone away after a newfs (I tested it by dd'ing /dev/zero to a
file on that partition, filling it up, then reading the file back in).
The disk is a Seagate Medallist 1GB SCSI-2 drive, the last drive on
the third NCR53c810 controller.  Is there anything I should be
worried about now?

ncr2 <ncr 53c810 scsi> rev 2 int a irq 11 on pci0:12
ncr2 waiting for scsi devices to settle
(ncr2:0:0): "Quantum XP32150 81HB" type 0 fixed SCSI 2
sd6(ncr2:0:0): Direct-Access 
sd6(ncr2:0:0): FAST SCSI-2 100ns (10 Mb/sec) offset 8.
2050MB (4199760 512 byte sectors)
sd6(ncr2:0:0): with 3907 cyls, 10 heads, and an average 107 sectors/track
(ncr2:1:0): "Quantum XP32150 81HB" type 0 fixed SCSI 2
sd7(ncr2:1:0): Direct-Access 
sd7(ncr2:1:0): FAST SCSI-2 100ns (10 Mb/sec) offset 8.
2050MB (4199760 512 byte sectors)
sd7(ncr2:1:0): with 3907 cyls, 10 heads, and an average 107 sectors/track
(ncr2:2:0): "SEAGATE ST51080N 0913" type 0 fixed SCSI 2
sd8(ncr2:2:0): Direct-Access 
sd8(ncr2:2:0): FAST SCSI-2 100ns (10 Mb/sec) offset 8.
1030MB (2109840 512 byte sectors)
sd8(ncr2:2:0): with 4826 cyls, 4 heads, and an average 109 sectors/track

--
Brian Tao (BT300, taob@io.org)
Systems Administrator, Internex Online Inc.
"Though this be madness, yet there is method in't"




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