07-15-2003
From Sunsolve:
Quote:
Solaris[TM] sd driver taq queuing problems/sd_max_throttle
How does one fix SCSI disk tag queuing problem?
By setting sd_max_throttle, in /etc/system, to a lower value.
sd_max_throttle, a sd driver tunable parameter, determines the max
number of commands that can be queued up by sd to be submitted to the
HBA (Host Bus Adapter) driver. By default, sd_max_throttle is 256.
Since SCSI tag queuing, SCSI_OPTIONS_TAG (0x80), is enabled by default
in Solaris, when the disk controller is fully populated with targets
or having very fast disks (e.g., RAID devices), commands can be queued
up too fast (and reach the limit of 256) for sd driver to handle.
Once this condition is met, tagged command time-outs/retries or SCSI
transport failure messages often are displayed:
-> WARNING: /io-unit@f,e1200000/sbi@0,0/dma@0,81000/esp@0,80000 (esp1):
-> Disconnected tagged cmds (1) timeout for Target 1.0
-> WARNING: /io-unit@f,e1200000/sbi@0,0/dma@0,81000/esp@0,80000/sd@1,0 (sd16):
-> Error for command 'write' Error Level: Retryable
-> WARNING: /io-unit@f,e0200000/sbi@0,0/dma@0,81000/esp@0,80000/sd@3,0 (sd3):
-> SCSI transport failed: reason 'timeout': retrying command
-> WARNING: /io-unit@f,e0200000/sbi@0,0/dma@0,81000/esp@0,80000/sd@3,0 (sd3):
-> unix: SCSI transport failed: reason 'incomplete': retrying command
Setting sd_max_throttle to use a much smaller value, such as < 256, can fix
the problem.
To what value should sd_max_throttle be set? That depends on how many SCSI
targets are in the system. To have total queued commands < 100 can be a
workable rule (e.g., if there are 6 fast SCSI targets), and if sd_max_throttle
is set to be 16, the total queued commands can be 96. If tagged command
timeouts still are seen, then in /etc/system:
set sd:sd_max_throttle = 16
Suggest you go to
Sunsolve and do a search as there is other information. If you have a contract with Sun (or if you are on warrenty), give them a call.
If not, post what OS/version, and the rest of the error message.
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LEARN ABOUT SUSE
vacation
vacation(1) User Manuals vacation(1)
NAME
vacation - reply to mail automatically
SYNOPSIS
vacation [ -I | -i | -l ] [ -F ]
vacation [ -j ] [ -a alias ] [ -f file ] [ -tN ] [ -r ] [ -? ] username
DESCRIPTION
vacation automatically replies to incoming mail. The reply is contained in the file .vacation.msg in your home directory. The vacation
program run interactively will create and/or edit a .vacation.msg file in your home directory. The old .vacation.msg will be backed up to
.vacation.old file. Type vacation with no arguments. (See USAGE below.)
For example, the message created by vacation is:
Subject: away from my mail
From: smith (via the vacation program)
I will not be reading my mail for a while. Your
mail regarding "$SUBJECT" will be
read when I return.
The .vacation.msg file should include a header with at least a `Subject:' line (it should not contain a `To:' line and need not contain a
`From:' line, since these are generated automatically).
The fields `From', `From:' and `Reply-To:' are evaluated in the following order: If there is a `Reply-To:', and the option -r is given,
then its entry is accepted. Otherwise, the entry of the `From:' field is taken. Should this entry lack a complete domain address (e.g.
user@site instead of user@site.domain), vacation evaluates the `From' field, converting the contained UUCP bang path into a domain style
address. If this fails too, vacation gives up.
If the string $SUBJECT appears in the .vacation.msg file, it is replaced with the subject of the original message when the reply is sent.
No message is sent if the `To:' or the `Cc:' line does not list the user to whom the original message was sent or one of a number of
aliases for them, if the initial From line includes one of the strings -request@, postmaster, uucp, mailer-daemon, mailer or -relay or if a
`Precedence: bulk' or `Precedence: junk' or `Precedence: list' line is included in the header. The search for special senders is made case-
independant.
OPTIONS
-I Or -i initialize the .vacation.db file and start vacation. This should only be used on the command line, not in the .forward file.
-F Force creation of .vacation.db even if the $HOME directory is identified as a NFS file system. Please note that the used data base
is not portable between 32bit and 64bit architectures and also not portable between little and big endianess architectures even same
bit-wide is used for. Therefore the initial creation of the .vacation.db should always happen on the server used for receiving
mails for the specific user.
-l List the content of the vacation database file including the address and the associated time of the last auto-response to that
address. This should only be used on the command line, not in the .forward file.
If the -I, -i or -l flag is not specified, and a user argument is given, vacation reads the first line from the standard input (for a
`From:' line, no colon). If absent, it produces an error message. The following options may be specified:
-a alias
Indicate that alias is one of the valid aliases for the user running vacation, so that mail addressed to that alias generates a
reply.
-j Do not check whether the recipient appears in the `To:' or the `Cc:' line. Reply always.
-tN Change the interval between repeat replies to the same sender. N is the number of days between replies. Default is one week.
-r If there is a `Reply-To:' header, send the automatic reply to the address given there. Otherwise, use the `From:' entry.
-f <file>
use a different message file than the default, .vacation.msg . The path to this file is relative to the home directory of the user.
-? issue short usage line.
USAGE
The vacation, create a .forward file in your home directory containing a line of the form:
username, "|/usr/bin/vacation username"
where username is your login name. The original .forward will be backed up to .forward.old file.
Then type in the command:
vacation -I
To stop vacation, remove the .forward file, or move it to a new name.
If vacation is run with no arguments, it will create a new .vacation.msg file for you, using the editor specified by the VISUAL or EDITOR
environment variable, or vi(1) if neither of those environment variables are set. If a .forward file is not present in your home direc-
tory, it creates it for you, and automatically performs a `vacation -I' function, turning on vacation.
FILES
$HOME/.forward
$HOME/.vacation.msg
A list of senders is kept in the file .vacation.db in your home directory.
SEE ALSO
vi(1), sendmail(8)
AUTHOR
vacation is Copyright (c) 1983 by Eric P. Allman, University of Berkeley, California, and Copyright (c) 1993 by Harald Milz
(hm@seneca.ix.de). Tiny patches 1998 by Mark Seuffert (moak@pirate.de). Now maintained by Sean Rima (thecivvie@softhome.net)
3rd Berkeley Distribution March 2000 vacation(1)