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
2. 
3. 

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;