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тАО04-27-2011 02:12 AM
тАО04-27-2011 02:12 AM
Re: RHEL 5.5 multipath problem (P700m + MSA2324sa)
On a RHEL 5.6 box that I administer and that also uses the cciss driver to access the internal disks it helped to blacklist them in order to make multipath errors disappear.
I suspect the driver uses deprecated ioctl calls or is otherwise broken.
I'm not sure if this really matters, but I escaped the bang in the blacklist regex for it to work.
These are my vgroot/md1 internal disks:
# vgdisplay -v vgroot 2>/dev/null|awk '/PV Name/{system("mdadm -QD "$NF"|grep cciss")}'
0 104 2 0 active sync /dev/cciss/c0d0p2
1 104 18 1 active sync /dev/cciss/c0d1p2
# grep -A2 ^blacklist /etc/multipath.conf
blacklist {
devnode "^cciss\!c0d[01]"
}
Here I so far have only one SAN LUN attached.
And this is all multipath lists.
# multipath -ll
mpath0 (360060e801530d700000130d700000052) dm-8 HP,OPEN-V
[size=7.0G][features=1 queue_if_no_path][hwhandler=0][rw]
\_ round-robin 0 [prio=2][active]
\_ 0:0:0:0 sda 8:0 [active][ready]
\_ 1:0:0:0 sdb 8:16 [active][ready]
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тАО04-27-2011 04:05 AM - last edited on тАО08-25-2011 01:21 PM by Kevin_Paul
тАО04-27-2011 04:05 AM - last edited on тАО08-25-2011 01:21 PM by Kevin_Paul
Re: RHEL 5.5 multipath problem (P700m + MSA2324sa)
Hi Timo ,
not sure , but check this thread , this might be of some help :
http://h30499.www3.hp.com/t5/HP-BladeSystem/SAS-Switch-Port-Mapping/m-p/4516011#M7777
Rehards,
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тАО04-27-2011 06:17 AM
тАО04-27-2011 06:17 AM
Re: RHEL 5.5 multipath problem (P700m + MSA2324sa)
DL360 G6, MSA 2324sa
RHEL 5.6 -- 2.6.18-238.9.1.el5 x86_64
System is entirely up to date including:
device-mapper-multipath-0.4.7-42.el5_6.2, HPDMmultipath-4.4.1, PSP 8.70
# multipath -ll -v5
cciss!c1d0: not found in pathvec
cciss!c1d0: mask = 0x5
cciss!c1d0: bus = 4
cciss!c1d0: dev_t = 105:0
cciss!c1d0: size = 1432149760
cciss!c1d1: not found in pathvec
cciss!c1d1: mask = 0x5
cciss!c1d1: bus = 4
cciss!c1d1: dev_t = 105:16
cciss!c1d1: size = 1432149760
===== no paths =====
A) Wouldn't be appropriate to blacklist cciss from multipath.conf,
as that's driver for P800 SAS controller connected to MAS2324sa.
B) No SAS switches or Blade chassis involved here.
Server direct attached to storage.
C) Vendor and Model strings are contained in /sys/block/cciss!cXdX/device,
but not detected by multipath command?
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тАО05-10-2011 10:41 AM
тАО05-10-2011 10:41 AM
Re: RHEL 5.5 multipath problem (P700m + MSA2324sa)
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тАО02-27-2012 09:43 PM
тАО02-27-2012 09:43 PM
Re: RHEL 5.5 multipath problem (P700m + MSA2324sa)
There is bug in the device mapper multipah
https://bugzilla.redhat.com/show_bug.cgi?id=742906
Last that i recieved from RH is:
Ben Marzinski 2012-01-12 13:30:54 EST
"Personally, I favor leaving the bug open and fixing this in RHEL 5.9. "
I have same problems with rhel 5 update 6, but with blade servers P712m and P2000 sa g3.
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