EMC’s PowerPath Display paths

With EMC’s PowerPath product it may be useful to check the status of what is available as far as PowerPath is concerned.Use the “powermt display” command for this.
EXAMPLE:
# powermt displaytotal emcpower devices: 94, highest device number: 93==============================================================================———— Adapters ————   —– Device Paths ——  — Queued —##  Switch   Name                    Summary      Total Closed  IOs   Blocks==============================================================================0  Enabled  sbus@1f/fcaw@0          [...]

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Recover VxVm volumes procedure for DMP failures on EMC arrays

Details:
As a supplement to TechAlert 274518 (VERITAS Volume Manager 3.5 MP2 may not failover to alternate paths making loss of data availability and data corruption possible), this TechNote illustrates examples of dynamic multipathing (DMP) not failing over to alternate paths and the procedure to recover from such errors.
System Configuration
This problem can occur either on an [...]

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ASL (Array Support Library) for Hitachi Drive in VxVM DMP

Today, there was a problem when I tried to configure Hitachi HTC-USP1000 SAN devices presented to me
in Solaris 8 and Veritas Volume manager 3.5. There were 2 paths to each disk but Veritas does not seem
to realize that these disks are multipathed and was showing 2 disks instead of one with a multipath.
 
[ The fact [...]

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EMC PowerPath

Install the PowerPath package on Solaris (and other supported OS) and it provides EMC Clariion commands related to disk/path access.
cfgadm -c configure c3
powermt check
rm /dev/*dsk/emcpower6*
rm /devices/pseudo/emcp*6*
powermt check
powercf -q
powermt display dev=all # and check things are okay
powermt save
reboot if desired to ensure spurious device don’t pop up again.
powercf -q patches /kernel/etc/emcp.conf and remove any spurious devices.
It [...]

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Install HBA cards in Solaris

To display what HBA’s are installed.

prtdiag -v
dmesg
cat /var/adm/messages | grep -i wwn | more

To set the configuration you must carry out the following:

changes to the /etc/system file
HBA driver modifications
Persistent binding (HBA and SD driver config file)
EMC recommended changes
Install the Sun StorEdge SAN Foundation package

Changes to /etc/system

SCSI throttle
set sd:sd_max_throttle=20

Enable wide SCSI
set scsi_options=0×7F8

SCSI I/O timeout value
sd:sd_io_time=0×3c (with [...]

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