Document fins/I0865-1
FIN #: I0865-1
SYNOPSIS: Physical device paths for disks in StorEdge A1000/A3x00/A3500FC
arrays are incorrectly included in the output of 'format'
DATE: Aug/27/02
KEYWORDS: Physical device paths for disks in StorEdge A1000/A3x00/A3500FC
arrays are incorrectly included in the output of 'format'
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- Sun Proprietary/Confidential: Internal Use Only -
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FIELD INFORMATION NOTICE
(For Authorized Distribution by SunService)
SYNOPSIS: Physical device paths for disks in StorEdge A1000/A3x00/A3500FC
arrays are incorrectly included in the output of 'format'.
SunAlert: No
TOP FIN/FCO REPORT: No
PRODUCT_REFERENCE: Physical Device Path on A1000/A3x00/A3500FC
PRODUCT CATEGORY: Storage / Service
PRODUCTS AFFECTED:
Systems Affected:
-----------------
Mkt_ID Platform Model Description Serial Number
------ -------- ----- ----------- -------------
- ANYSYS - System Platform Independent -
X-Options Affected:
-------------------
Mkt_ID Platform Model Description Serial Number
------ -------- ----- ----------- -------------
- A1000 ALL A1000 Storage Array -
- A3000 ALL A3000 Storage Array -
- A3500 ALL A3500 Storage Array -
- A3500FC ALL A3500FC Storage Array -
PART NUMBERS AFFECTED:
Part Number Description Model
----------- ----------- -----
704-6708-10 CD SUN STOREDGE RAID Manager6.22 -
704-7937-05 CD RM 6.22.1 -
REFERENCES:
BugId: 4243870 - MCR/Add 3 A1000s, req for 00:00 21-Nov-99.
4587657 - Physical device paths show up after a power cycle of the
RAID Module.
4587794 - physical device paths show up in format for second sonoma
before running hotadd.
4488911 - RDAC physical paths are seen after a reboot or "cfgadm -c
configure" w/mpxio.
4492343 - RM6.22.1: physical paths are created after controller
failover/failback w/mpxio.
4493133 - RM6.22x: after hot_add, controller failover/back, devices
get bad links.
4516766 - Enabling mpxio delays device enumeration so rdac doesn't
see all LUNs.
PROBLEM DESCRIPTION:
Disks in StorEdge A1000/A3x00/A3500FC arrays may sometimes be shown as
having physical device paths in addition to pseudo device paths with
the 'format' utility. Although the disks and arrays will continue to
function normally, this issue may cause confusion for system
administrators and support personnel.
This issue applies to any system type with StorEdge A1000/A3x00/A3500FC
arrays with Raid Manager 6.22 or 6.22.1 installed.
Use the following commands to determine if the affected version of Raid
Manager software is installed:
# pkginfo -l SUNWosar
VERSION: 06.22, REV=01.14 <--- 6.22
OR
# pkginfo -l SUNWosar
VERSION: 06.22,REV=01.54 <--- 6.22.1
Normally, only pseduo device paths for an A1000/A3x00/A3500FC array
will show from the format utility as follows:
# format
Searching for disks...done
AVAILABLE DISK SELECTIONS:
0. c0t0d0 <SUN9.0G cyl 4924 alt 2 hd 27 sec 133>
/pci@1f,4000/scsi@3/sd@0,0
1. c5t5d0 <Symbios-StorEdgeA3500FCd-0003 cyl 2498 alt 2 hd 64 sec
64>
/pseudo/rdnexus@5/rdriver@5,0
2. c6t4d1 <Symbios-StorEdgeA3500FCd-0003 cyl 2498 alt 2 hd 64 sec
64>
/pseudo/rdnexus@6/rdriver@4,1
However, in some cases, physical device paths will display in addition to the
pseudo device paths:
# format
Searching for disks...done
AVAILABLE DISK SELECTIONS:
0. c0t0d0 <SUN9.0G cyl 4924 alt 2 hd 27 sec 133>
/pci@1f,4000/scsi@3/sd@0,0
1. c5t5d0 <Symbios-StorEdgeA3500FCd-0003 cyl 2498 alt 2 hd 64 sec
64>
/pseudo/rdnexus@5/rdriver@5,0
2. c6t4d1 <Symbios-StorEdgeA3500FCd-0003 cyl 2498 alt 2 hd 64 sec
64>
/pseudo/rdnexus@6/rdriver@4,1
3. c7t5d0 <Symbios-StorEdgeA3500FCd-0003 cyl 2498 alt 2 hd 64 sec
64>
/pci@4,2000/SUNW,qlc@1/fp@0,0/ssd@w201700a0b806bdb9,0
4. c7t5d1 <Symbios-StorEdgeA3500FCd-0003 cyl 2498 alt 2 hd 64 sec
64>
/pci@4,2000/SUNW,qlc@1/fp@0,0/ssd@w201700a0b806bdb9,1
5. c8t4d0 <Symbios-StorEdgeA3500FCd-0003 cyl 2498 alt 2 hd 64 sec
64>
/pci@4,4000/SUNW,qlc@4/fp@0,0/ssd@w201600a0b806bdb9,0
6. c8t4d1 <Symbios-StorEdgeA3500FCd-0003 cyl 2498 alt 2 hd 64 sec
64>
/pci@4,4000/SUNW,qlc@4/fp@0,0/ssd@w201600a0b806bdb9,1
Devices c7* and c8* now exist when they did not exist before.
There are seven RM6.22/RM6.22.1 bugs reported to have the same type
of failure. Please see the bugs for details.
Bug 4243870 A3x00 - new devices show up in format that should not
whenever disks(1m) run
Bug 4587657 Physical device paths show up after a power cycle of the
RAID Module.
Bug 4587794 Physical device paths show up in format for second sonoma
before running hotadd.
Bug 4488911 RDAC physical paths are seen after a reboot or "cfgadm -c
configure" w/mpxio.
Bug 4492343 RM6.22.1: physical paths are created after controller
failover/failback w/mpxio.
Bug 4493133 RM6.22x: after hot_add, controller failover/back, devices
get bad links.
Bug 4516766 Enabling mpxio delays device enumeration so rdac doesn't
see all LUNs.
This problem occurs due to insufficient coordination between the
Redundant Disk Array Controller (RDAC), the sd/ssd driver and the
devfsadmd daemon. The problem was identified but the proposed fix was
never released because fatal design issues were discovered by the
Solaris I/O group. See bugID 4243870 to obtain a more detailed root
cause.
There is no permanent fix for this issue, but there is a simple
workaround. See below.
IMPLEMENTATION:
---
| | MANDATORY (Fully Proactive)
---
---
| | CONTROLLED PROACTIVE (per Sun Geo Plan)
---
---
| X | REACTIVE (As Required)
---
CORRECTIVE ACTION:
The following recommendation is provided as a guideline for authorized
Sun Services Field Representatives who may encounter the above
mentioned problem.
If physical device paths appear in the output of 'format', run the
RAID Manager 6 'hot_add' command as shown below.
# /usr/lib/osa/bin/hot_add
'hot_add' will clear the physical device paths and 'format' will only
show the pseduo device paths.
COMMENTS:
None.
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Implementation Footnote:
i) In case of MANDATORY FINs, Enterprise Services will attempt to
contact all affected customers to recommend implementation of
the FIN.
ii) For CONTROLLED PROACTIVE FINs, Enterprise 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, Enterprise Services will implement the FIN as the
need arises.
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