Document fins/I0918-1
FIN #: I0918-1
SYNOPSIS: SCSI Bus error messages at boot time when Sun StorEdge L7 Tape
Autloader is connected to X6541A SCSI Host Bus Adapter
DATE: Dec/18/02
KEYWORDS: SCSI Bus error messages at boot time when Sun StorEdge L7 Tape
Autloader is connected to X6541A SCSI Host Bus Adapter
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- Sun Proprietary/Confidential: Internal Use Only -
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FIELD INFORMATION NOTICE
(For Authorized Distribution by SunService)
SYNOPSIS: SCSI Bus error messages at boot time when Sun StorEdge L7 Tape
Autloader is connected to X6541A SCSI Host Bus Adapter.
SunAlert: No
TOP FIN/FCO REPORT: No
PRODUCT_REFERENCE: Sun StorEdge L7 Tape Autoloader
PRODUCT CATEGORY: Storage / Service
PRODUCTS AFFECTED:
Systems Affected:
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Mkt_ID Platform Model Description Serial Number
------ -------- ----- ----------- -------------
- ANYSYS - System Platform Independent -
X-Options Affected:
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Mkt_ID Platform Model Description Serial Number
------ -------- ----- ----------- -------------
X6541A - ALL SCSI Host Bus Adapter (HBA) -
SG-XAUTODLT8-L7 - ALL L7 Tape Autoloader -
PART NUMBERS AFFECTED:
Part Number Description Model
----------- ----------- -----
- - -
REFERENCES:
BugId: 4770492 - error messages "got SCSI bus reset" during boot with
Sun StorEdge L7 connected.
URl: http://sdpsweb.central/FIN_FCO/FIN/FINI0918-1_dir/L7_errata.pdf
PROBLEM DESCRIPTION:
SCSI Bus error messages may appear at boot time when Sun StorEdge L7
Tape Autoloader units are attached to Dual Differential Ultra/Wide SCSI
(PCI) Host Bus Adapters (Option X6541A). These messages can be ignored
and the tape Unit will function normally once the host has booted up.
This issue affects any Sun StorEdge L7 Tape Autoloader attached to an
X6541A HBA on a platform running Solaris 8 or Solaris 9. Other
versions of Solaris are not affected.
When this issue occurs, messages like "Connected command timeout for
Target" and "SCSI Bus Reset" may appear on the console at boot time
only. This is an indication that the Solaris glm driver could not
negotiate with the L7 Tape unit in Synchronous SCSI mode. After the
SCSI bus reset event occurs, the glm driver correctly negotiates in
Asynchronous SCSI mode.
Similar warning messages may be recorded in the /var/adm/messages file:
Nov 7 16:13:50 <hostname> \
scsi: [ID 107833 kern.warning] WARNING: /pci@8,700000/scsi@2,1 (glm3):
Nov 7 16:13:50 <hostname> \
Connected command timeout for Target 1.0
Nov 7 16:13:50 <hostname> \
genunix: [ID 408822 kern.info] NOTICE: glm3: fault detected in \
device; service still available
Nov 7 16:13:50 <hostname> \
genunix: [ID 611667 kern.info] NOTICE: glm3: Connected command \
timeout for Target 1.0
Nov 7 16:13:50 <hostname> \
glm: [ID 280919 kern.warning] WARNING: ID[SUNWpd.glm.cmd_timeout.6017]
Nov 7 16:13:50 <hostname> \
scsi: [ID 107833 kern.warning] WARNING: /pci@8,700000/scsi@2,1 (glm3):
Nov 7 16:13:50 <hostname> \
got SCSI bus reset
Nov 7 16:13:50 <hostname> \
genunix: [ID 408822 kern.info] NOTICE: glm3: fault detected in \
device; service still available
Nov 7 16:13:50 <hostname> \
genunix: [ID 611667 kern.info] NOTICE: glm3: got SCSI bus reset
The warning message sequence above may occur as the glm driver
(HBA/host side) first attempts Synchronous SCSI negotiation with the L7
robotics controller (target side), however, the L7 robotics controller
is an Asynchronous SCSI device.
There are NO implications once the system has completed booting and is
fully operational. The HBA (host) and L7 controller (target) behave
correctly in Asynchronous SCSI mode. Additionally, the DLT 8000 unit
will negotiate correctly in Synchronous fast/wide SCSI mode with
maximum burst rate of 20 MB/sec per DLT 8000 tape drive specification.
The host system will not indicate any further warning messages.
Work is underway on a glm driver fix for Solaris 8 and 9. Other
releases of Solaris are not affected. Patches will be posted to
SunSolve when available. In the meantime, the error messages may be
safely ignored.
IMPLEMENTATION:
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| | MANDATORY (Fully Proactive)
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| | CONTROLLED PROACTIVE (per Sun Geo Plan)
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| X | REACTIVE (As Required)
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CORRECTIVE ACTION:
The following recommendation is provided as a guideline for authorized
Sun Services Field Representatives who may encounter the above
mentioned problem.
At this time, the boot time SCSI Bus error messages may be ignored. No
action is required. When the glm driver patches are available on
SunSolve, a follow-up FIN will be issued with implementation
instructions.
For more information about this issue and other late-breaking news for
the Sun StorEdge L7 Tape Autoloader, refer to the "Errata Sheet for the
StorEdge L7 Autoloader with DLT8000 Tape Drive" at:
http://sdpsweb.central/FIN_FCO/FIN/FINI0918-1_dir/L7_errata.pdf
COMMENTS:
None.
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Implementation Footnote:
i) In case of MANDATORY FINs, Sun Services will attempt to contact
all affected customers to recommend implementation of the FIN.
ii) For CONTROLLED PROACTIVE FINs, Sun Services mission critical
support teams will recommend implementation of the FIN (to their
respective accounts), at the convenience of the customer.
iii) For REACTIVE FINs, Sun Services will implement the FIN as the
need arises.
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