Is my disk hot swappable

[Stephen Keogh]

Hi All,

tunix04:HZNQ1 >uname -a
HP-UX tunix04 B.11.11 U 9000/800 811980681 unlimited-user license

tunix04 >vgdisplay -v vg00 tells me

I have a disk [/dev/dsk/c1t15d0] that is "unavailable". Other disk in the Volume Group [/dev/dsk/c3t15d0] is "available"

tunix04 >diskinfo /dev/rdsk/c1t15d0

SCSI describe of /dev/rdsk/c1t15d0:

             vendor: HP 36.4G

         product id: ST336753LC

               type: direct access

               size: 35566480 Kbytes

   bytes per sector: 512

I am trying to work out a plan for the replacement of the "unavailable" disk and wish to know if my disk is hot swappable

Any thoughts and feedback is welcome

Steve

P.S. This thread has been moved from Storage > Disk to HP-UX > sysadmin - HP Forums Moderatror

[Torsten.]

Could you please send

# model

# strings /etc/lvmtab

# ioscan -fn

[Stephen Keogh]

Hi Torsten,

tunix04:HZNQ1 >model
9000/800/A500-7X

tunix04 >strings /etc/lvmtab
/dev/vg00
/dev/dsk/c1t15d0
/dev/dsk/c3t15d0
/dev/vg01
/dev/dsk/c9t0d0
/dev/dsk/c9t1d0
/dev/dsk/c9t2d0
/dev/dsk/c9t3d0
/dev/dsk/c9t4d0
/dev/dsk/c9t5d0
tunix04 >

tunix04 >ioscan -fn
Class       I  H/W Path      Driver    S/W State   H/W Type     Description
============================================================================
root        0                root      CLAIMED     BUS_NEXUS
ioa         0  0             sba       CLAIMED     BUS_NEXUS    System Bus Adapter (582)
ba          0  0/0           lba       CLAIMED     BUS_NEXUS    Local PCI Bus Adapter (782)
lan         0  0/0/0/0       btlan     CLAIMED     INTERFACE    HP PCI 10/100Base-TX Core
                            /dev/diag/lan0  /dev/ether0     /dev/lan0
ext_bus     0  0/0/1/0       c720      CLAIMED     INTERFACE    SCSI C896 Ultra Wide LVD
target      0  0/0/1/0.7     tgt       CLAIMED     DEVICE
ctl         0  0/0/1/0.7.0   sctl      CLAIMED     DEVICE       Initiator
                            /dev/rscsi/c0t7d0
ext_bus     1  0/0/1/1       c720      CLAIMED     INTERFACE    SCSI C896 Ultra Wide Single-Ended
target      1  0/0/1/1.7     tgt       CLAIMED     DEVICE
ctl         1  0/0/1/1.7.0   sctl      CLAIMED     DEVICE       Initiator
                            /dev/rscsi/c1t7d0
target      2  0/0/1/1.15    tgt       CLAIMED     DEVICE
disk        1  0/0/1/1.15.0  sdisk     CLAIMED     DEVICE       HP 36.4GST336753LC
                            /dev/dsk/c1t15d0   /dev/rdsk/c1t15d0
ext_bus     2  0/0/2/0       c720      CLAIMED     INTERFACE    SCSI C87x Fast Wide Single-Ended
target      3  0/0/2/0.7     tgt       CLAIMED     DEVICE
ctl         2  0/0/2/0.7.0   sctl      CLAIMED     DEVICE       Initiator
                            /dev/rscsi/c2t7d0
ext_bus     3  0/0/2/1       c720      CLAIMED     INTERFACE    SCSI C87x Ultra Wide Single-Ended
target      4  0/0/2/1.7     tgt       CLAIMED     DEVICE
ctl         3  0/0/2/1.7.0   sctl      CLAIMED     DEVICE       Initiator
                            /dev/rscsi/c3t7d0
target      5  0/0/2/1.15    tgt       CLAIMED     DEVICE
disk        2  0/0/2/1.15.0  sdisk     CLAIMED     DEVICE       HP 36.4GST336753LC
                            /dev/dsk/c3t15d0   /dev/rdsk/c3t15d0
tty         1  0/0/4/0       func0     CLAIMED     INTERFACE    PCI BaseSystem (103c128d)
tty         0  0/0/4/1       asio0     CLAIMED     INTERFACE    PCI Serial (103c1048)
                            /dev/GSPdiag1   /dev/diag/mux0  /dev/mux0       /dev/tty0p0     /dev/tty0p2     /dev/tty0p3     /dev/tty0p4
ba          1  0/2           lba       CLAIMED     BUS_NEXUS    Local PCI Bus Adapter (782)
ext_bus     9  0/2/0/0       mpt       CLAIMED     INTERFACE    SCSI Ultra320 A6961-60011
                            /dev/mpt9
target      6  0/2/0/0.0     tgt       CLAIMED     DEVICE
disk       17  0/2/0/0.0.0   sdisk     CLAIMED     DEVICE       COMPAQ  BD3008A4C6
                            /dev/dsk/c9t0d0   /dev/rdsk/c9t0d0
target      7  0/2/0/0.1     tgt       CLAIMED     DEVICE
disk       18  0/2/0/0.1.0   sdisk     CLAIMED     DEVICE       COMPAQ  BD3008A4C6
                            /dev/dsk/c9t1d0   /dev/rdsk/c9t1d0
target      8  0/2/0/0.2     tgt       CLAIMED     DEVICE
disk       19  0/2/0/0.2.0   sdisk     CLAIMED     DEVICE       COMPAQ  BD3008A4C6
                            /dev/dsk/c9t2d0   /dev/rdsk/c9t2d0
target      9  0/2/0/0.3     tgt       CLAIMED     DEVICE
disk       20  0/2/0/0.3.0   sdisk     CLAIMED     DEVICE       COMPAQ  BD3008A4C6
                            /dev/dsk/c9t3d0   /dev/rdsk/c9t3d0
target     10  0/2/0/0.4     tgt       CLAIMED     DEVICE
disk       21  0/2/0/0.4.0   sdisk     CLAIMED     DEVICE       COMPAQ  BD3008A4C6
                            /dev/dsk/c9t4d0   /dev/rdsk/c9t4d0
target     11  0/2/0/0.5     tgt       CLAIMED     DEVICE
disk       22  0/2/0/0.5.0   sdisk     CLAIMED     DEVICE       COMPAQ  BD3008A4C6
                            /dev/dsk/c9t5d0   /dev/rdsk/c9t5d0
target     12  0/2/0/0.7     tgt       CLAIMED     DEVICE
ctl         7  0/2/0/0.7.0   sctl      CLAIMED     DEVICE       Initiator
                            /dev/rscsi/c9t7d0
target     13  0/2/0/0.15    tgt       CLAIMED     DEVICE
ctl         8  0/2/0/0.15.0  sctl      CLAIMED     DEVICE       COMPAQ  PROLIANT 4L7E*DB
                            /dev/rscsi/c9t15d0
ext_bus    10  0/2/0/1       mpt       CLAIMED     INTERFACE    SCSI Ultra320 A6961-60011
                            /dev/mpt10
target     14  0/2/0/1.7     tgt       CLAIMED     DEVICE
ctl         9  0/2/0/1.7.0   sctl      CLAIMED     DEVICE       Initiator
                            /dev/rscsi/c10t7d0
ba          2  0/4           lba       CLAIMED     BUS_NEXUS    Local PCI Bus Adapter (782)
fc          1  0/4/0/0       td        CLAIMED     INTERFACE    HP Tachyon XL2 Fibre Channel Mass Storage Adapter
                            /dev/td1
ba          3  0/6           lba       CLAIMED     BUS_NEXUS    Local PCI Bus Adapter (782)
ext_bus     8  0/6/0/0       c8xx      CLAIMED     INTERFACE    SCSI C1010 Ultra160 Wide LVD A6828-60101
target     15  0/6/0/0.7     tgt       CLAIMED     DEVICE
ctl         6  0/6/0/0.7.0   sctl      CLAIMED     DEVICE       Initiator
                            /dev/rscsi/c8t7d0
lan         1  0/6/2/0       btlan     CLAIMED     INTERFACE    HP A5230A/B5509BA PCI 10/100Base-TX Addon
                            /dev/diag/lan1  /dev/ether1     /dev/lan1
memory      0  8             memory    CLAIMED     MEMORY       Memory
processor   0  160           processor CLAIMED     PROCESSOR    Processor
tunix04 >

Many thanks

Steve

[Torsten.]

Next time better open the thread in HP-UX sub forum.

However, here we go.

The disk is CLAIMED, this doesn't look bad.

disk        1  0/0/1/1.15.0  sdisk     CLAIMED     DEVICE       HP 36.4GST336753LC
                            /dev/dsk/c1t15d0   /dev/rdsk/c1t15d0

I would now test the disk for errors:

# dd if=/dev/rdsk/c1t15d0 of=/dev/null bs=4096k

This will take a while.

If no I/O errors, try to activate it:

# vgchange -a y vg00

# vgsync vg00 &

Please post

# vgdisplay -v vg00

[Stephen Keogh]

Hi Torsten,

Sorry for choosing the wrong Forum to post this problem.

An attempt to check for I/O errors hangs ...

root 29891     1  0  Apr 17  ?         0:00 dd if=/dev/rdsk/c1t15d0 of=/dev/null bs=8192k count=10

tunix04 >vgdisplay -v vg00
--- Volume groups ---
VG Name                     /dev/vg00
VG Write Access             read/write
VG Status                   available
Max LV                      255
Cur LV                      10
Open LV                     10
Max PV                      16
Cur PV                      2
Act PV                      2
Max PE per PV               4350
VGDA                        4
PE Size (Mbytes)            8
Total PE                    8680
Alloc PE                    4195
Free PE                     4485
Total PVG                   0
Total Spare PVs             0
Total Spare PVs in use      0

   --- Logical volumes ---
   LV Name                     /dev/vg00/lvol1
   LV Status                   available/stale
   LV Size (Mbytes)            304
   Current LE                  38
   Allocated PE                76
   Used PV                     2

   LV Name                     /dev/vg00/lvol2
   LV Status                   available/stale
   LV Size (Mbytes)            3072
   Current LE                  384
   Allocated PE                768
   Used PV                     2

   LV Name                     /dev/vg00/lvol3
   LV Status                   available/stale
   LV Size (Mbytes)            200
   Current LE                  25
   Allocated PE                50
   Used PV                     2

   LV Name                     /dev/vg00/lvol4
   LV Status                   available/stale
   LV Size (Mbytes)            1024
   Current LE                  128
   Allocated PE                256
   Used PV                     2

   LV Name                     /dev/vg00/lvol5
   LV Status                   available/stale
   LV Size (Mbytes)            2000
   Current LE                  250
   Allocated PE                500
   Used PV                     2

   LV Name                     /dev/vg00/lvol6
   LV Status                   available/stale
   LV Size (Mbytes)            400
   Current LE                  50
   Allocated PE                100
   Used PV                     2

   LV Name                     /dev/vg00/lvol7
   LV Status                   available/stale
   LV Size (Mbytes)            1576
   Current LE                  197
   Allocated PE                394
   Used PV                     2

   LV Name                     /dev/vg00/lvol8
   LV Status                   available/stale
   LV Size (Mbytes)            3576
   Current LE                  447
   Allocated PE                894
   Used PV                     2

   LV Name                     /dev/vg00/lvol9
   LV Status                   available/stale
   LV Size (Mbytes)            1128
   Current LE                  141
   Allocated PE                282
   Used PV                     2

   LV Name                     /dev/vg00/lvol10
   LV Status                   available/syncd
   LV Size (Mbytes)            7000
   Current LE                  875
   Allocated PE                875
   Used PV                     2

   --- Physical volumes ---
   PV Name                     /dev/dsk/c1t15d0
   PV Status                   unavailable
   Total PE                    4340
   Free PE                     2131
   Autoswitch                  On

   PV Name                     /dev/dsk/c3t15d0
   PV Status                   available
   Total PE                    4340
   Free PE                     2354
   Autoswitch                  On

tunix04 >

Many thanks

Steve

[Torsten.]

The "dd" will run around 30min - more or less.


I think you have to wait ...

Don't use "count", read the complete disk.

[Torsten.]

Just in case the disk is really dead, hot swap the disk.

See

When_Good_Disks_Go_Bad_WP
http://bizsupport2.austin.hp.com/bc/docs/support/SupportManual/c01911837/c01911837.pdf

0/0/1/1.15.0 is the upper disk.

[Stephen Keogh]

Hi Torsten,

An attempt to check for I/O errors hangs ... there is one here from the 17th April ...

tunix04 >ps -ef | grep dd
    root 29891     1  0  Apr 17  ?         0:00 dd if=/dev/rdsk/c1t15d0 of=/dev/null bs=8192k count=10
    root 27036 19559  0 15:12:34 pts/15    0:00 dd if=/dev/rdsk/c1t15d0 of=/dev/null bs=4096k
    root 17273 19559  0 14:37:19 pts/15    0:00 dd if=/dev/rdsk/c1t15d0 of=/dev/null bs=4096k count=10

Thank you for the Link to [When_Good_Disks_Go_Bad_WP]

So how do I know if my problem disk is hot swappable ?

Many thanks

Steve

[Torsten.]

It is.

Please strictly follow the instructions.

Disable LVM access (pvchange -a n ...).

This is important, other wise you cannot do a vgcfgrestore!

[Stephen Keogh]

Hi Torsten,

Thank you for your input today. I will follow the instructions.

Steve