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Bug 50853 - Increase SCSI disk timeout value
Increase SCSI disk timeout value
Product: Red Hat Linux
Classification: Retired
Component: kernel (Show other bugs)
All Linux
medium Severity medium
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Assigned To: Arjan van de Ven
Brock Organ
Depends On:
  Show dependency treegraph
Reported: 2001-08-03 18:27 EDT by Matt Domsch
Modified: 2007-04-18 12:35 EDT (History)
3 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
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Clone Of:
Last Closed: 2001-08-06 17:40:20 EDT
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RHEL 7.3 requirements from Atomic Host:
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Description Matt Domsch 2001-08-03 18:27:18 EDT
Description of Problem:
Running cerberus 9-20 against an Dell PERC3/QC (AMI MegaRAID) controller, 
there are a bunch of SCSI read/write timeouts.  AMI recommends increasing 
the SD_TIMEOUT value from 30 seconds to 60 seconds.

How Reproducible:
occasional.  Always with enough disk activity.  Seen on kernel 2.4.7-0.3.

Steps to Reproduce:
1. Run cerberus 9-20 against a PERC3/QC

Actual Results:
see SCSI disk timeouts in dmesg

Expected Results:
no disk timeouts reported

Additional Information:
Patch to increase timeout.

--- linux-2.4/drivers/scsi/sd.c.orig	Fri Aug  3 17:27:57 2001
+++ linux-2.4/drivers/scsi/sd.c	Fri Aug  3 17:28:05 2001
@@ -81,7 +81,7 @@
  *  Time out in seconds for disks and Magneto-opticals (which are slower).
-#define SD_TIMEOUT (30 * HZ)
+#define SD_TIMEOUT (60 * HZ)
 #define SD_MOD_TIMEOUT (75 * HZ)
 struct hd_struct *sd;
Comment 1 Glen Foster 2001-08-06 17:08:35 EDT
If the kernel team feels this is SHOULD- or MUST-FIX, we can mark it as such.
Comment 2 Arjan van de Ven 2001-08-06 17:40:15 EDT
SHOULD FIX and done so.

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