* Multipath problems with 2.6.8.1 [not found] <S265098AbUIIOeH/20040909143407Z+1912@vger.kernel.org> @ 2004-09-09 15:32 ` Jaime Peñalba 2004-09-09 15:59 ` Guy 2004-09-09 16:05 ` Jaime Peñalba 0 siblings, 2 replies; 4+ messages in thread From: Jaime Peñalba @ 2004-09-09 15:32 UTC (permalink / raw) To: linux-raid; +Cc: neilb [-- Attachment #1: Type: text/plain, Size: 3067 bytes --] Hi, Im having some troubles with multipath on a 2.6.8.1 linux kernel. Im using 2 QLogic 2344 connected to the SAN, i think that my problem is related to superblocks, because when i create a new multipath device, it writes the superblock for both disks and really is the same disk trought two paths. I have else tried to disable persistent superblock, but mdadm doesnt support multipath with the build mode. Im doing it like this 1) Start the md apache1:~/soft/mdadm-1.7.0# mdadm --create /dev/md0 --force --level multipath --raid-devices=1 /dev/sdb1 --spare-devices=1 /dev/sdd1 mdadm: array /dev/md0 started. apache1:~/soft/mdadm-1.7.0# cat /proc/mdstat Personalities : [multipath] md0 : active multipath sdd1[1] sdb1[0] 4882304 blocks [1/1] [U] unused devices: <none> This is ok and runs fine, But superblock is only at /dev/sdd1, so no remount would be possible, or i think so... apache1:~/soft/mdadm-1.7.0# mdadm -E /dev/sdb1 mdadm: No super block found on /dev/sdb1 (Expected magic a92b4efc, got 00000000) apache1:~/soft/mdadm-1.7.0# mdadm -E /dev/sdd1 /dev/sdd1: Magic : a92b4efc Version : 00.90.00 UUID : af3395fd:fac2b820:2ca7083c:612864e0 Creation Time : Thu Sep 9 17:20:43 2004 Raid Level : multipath Device Size : 4882304 (4.66 GiB 5.00 GB) Raid Devices : 1 Total Devices : 2 Preferred Minor : 0 Update Time : Thu Sep 9 17:20:43 2004 State : dirty Active Devices : 1 Working Devices : 2 Failed Devices : 0 Spare Devices : 1 Checksum : 63bc7489 - correct Events : 0.36 Number Major Minor RaidDevice State this 1 8 49 1 spare /dev/sdd1 0 0 8 17 0 active sync /dev/sdb1 1 1 8 49 1 spare /dev/sdd1 2) Stop the md apache1:~/soft/mdadm-1.7.0# mdadm -S /dev/md0 3) Start the md again apache1:~/soft/mdadm-1.7.0# mdadm --assemble /dev/md0 --uuid=af3395fd:fac2b820:2ca7083c:612864e0 /dev/sdb1 /dev/sdd1 mdadm: no RAID superblock on /dev/sdb1 mdadm: /dev/sdb1 has wrong uuid. mdadm: /dev/md0 has been started with 1 drive. apache1:~/soft/mdadm-1.7.0# cat /proc/mdstat Personalities : [multipath] md0 : active multipath sdd1[0] 4882304 blocks [1/1] [U] unused devices: <none> Now things arent working very well.... apache1:~/soft/mdadm-1.7.0# mdadm --detail /dev/md0 /dev/md0: Version : 00.90.01 Creation Time : Thu Sep 9 17:20:43 2004 Raid Level : multipath Array Size : 4882304 (4.66 GiB 5.00 GB) Raid Devices : 1 Total Devices : 1 Preferred Minor : 0 Persistence : Superblock is persistent Update Time : Thu Sep 9 17:26:21 2004 State : clean Active Devices : 1 Working Devices : 1 Failed Devices : 0 Spare Devices : 0 Number Major Minor RaidDevice State 0 8 49 0 active sync /dev/sdd1 UUID : af3395fd:fac2b820:2ca7083c:612864e0 Events : 0.37 I would appreciate very much any help with this. Thanks, Jaime. [-- Attachment #2: S/MIME Cryptographic Signature --] [-- Type: application/x-pkcs7-signature, Size: 3936 bytes --] ^ permalink raw reply [flat|nested] 4+ messages in thread
* RE: Multipath problems with 2.6.8.1 2004-09-09 15:32 ` Multipath problems with 2.6.8.1 Jaime Peñalba @ 2004-09-09 15:59 ` Guy 2004-09-09 18:25 ` Jaime Peñalba 2004-09-09 16:05 ` Jaime Peñalba 1 sibling, 1 reply; 4+ messages in thread From: Guy @ 2004-09-09 15:59 UTC (permalink / raw) To: 'Jaime Peñalba', linux-raid; +Cc: neilb Somehow you confused it! And me. You used multipath and spare, but only listed 2 devices. I don't think a multipath array can have a spare disk. Are you sure the 2 paths point to the same disk? I have never user multipath, so I am just guessing. If you have no data you need to save yet, try this: mdadm --create /dev/md0 --force --level multipath /dev/sdb1 /dev/sdd1 or mdadm --create /dev/md0 --force --level multipath --raid-devices=2 /dev/sdb1 /dev/sdd1 Guy -----Original Message----- From: linux-raid-owner@vger.kernel.org [mailto:linux-raid-owner@vger.kernel.org] On Behalf Of Jaime Peñalba Sent: Thursday, September 09, 2004 11:33 AM To: linux-raid@vger.kernel.org Cc: neilb@cse.unsw.edu.au Subject: Multipath problems with 2.6.8.1 Hi, Im having some troubles with multipath on a 2.6.8.1 linux kernel. Im using 2 QLogic 2344 connected to the SAN, i think that my problem is related to superblocks, because when i create a new multipath device, it writes the superblock for both disks and really is the same disk trought two paths. I have else tried to disable persistent superblock, but mdadm doesnt support multipath with the build mode. Im doing it like this 1) Start the md apache1:~/soft/mdadm-1.7.0# mdadm --create /dev/md0 --force --level multipath --raid-devices=1 /dev/sdb1 --spare-devices=1 /dev/sdd1 mdadm: array /dev/md0 started. apache1:~/soft/mdadm-1.7.0# cat /proc/mdstat Personalities : [multipath] md0 : active multipath sdd1[1] sdb1[0] 4882304 blocks [1/1] [U] unused devices: <none> This is ok and runs fine, But superblock is only at /dev/sdd1, so no remount would be possible, or i think so... apache1:~/soft/mdadm-1.7.0# mdadm -E /dev/sdb1 mdadm: No super block found on /dev/sdb1 (Expected magic a92b4efc, got 00000000) apache1:~/soft/mdadm-1.7.0# mdadm -E /dev/sdd1 /dev/sdd1: Magic : a92b4efc Version : 00.90.00 UUID : af3395fd:fac2b820:2ca7083c:612864e0 Creation Time : Thu Sep 9 17:20:43 2004 Raid Level : multipath Device Size : 4882304 (4.66 GiB 5.00 GB) Raid Devices : 1 Total Devices : 2 Preferred Minor : 0 Update Time : Thu Sep 9 17:20:43 2004 State : dirty Active Devices : 1 Working Devices : 2 Failed Devices : 0 Spare Devices : 1 Checksum : 63bc7489 - correct Events : 0.36 Number Major Minor RaidDevice State this 1 8 49 1 spare /dev/sdd1 0 0 8 17 0 active sync /dev/sdb1 1 1 8 49 1 spare /dev/sdd1 2) Stop the md apache1:~/soft/mdadm-1.7.0# mdadm -S /dev/md0 3) Start the md again apache1:~/soft/mdadm-1.7.0# mdadm --assemble /dev/md0 --uuid=af3395fd:fac2b820:2ca7083c:612864e0 /dev/sdb1 /dev/sdd1 mdadm: no RAID superblock on /dev/sdb1 mdadm: /dev/sdb1 has wrong uuid. mdadm: /dev/md0 has been started with 1 drive. apache1:~/soft/mdadm-1.7.0# cat /proc/mdstat Personalities : [multipath] md0 : active multipath sdd1[0] 4882304 blocks [1/1] [U] unused devices: <none> Now things arent working very well.... apache1:~/soft/mdadm-1.7.0# mdadm --detail /dev/md0 /dev/md0: Version : 00.90.01 Creation Time : Thu Sep 9 17:20:43 2004 Raid Level : multipath Array Size : 4882304 (4.66 GiB 5.00 GB) Raid Devices : 1 Total Devices : 1 Preferred Minor : 0 Persistence : Superblock is persistent Update Time : Thu Sep 9 17:26:21 2004 State : clean Active Devices : 1 Working Devices : 1 Failed Devices : 0 Spare Devices : 0 Number Major Minor RaidDevice State 0 8 49 0 active sync /dev/sdd1 UUID : af3395fd:fac2b820:2ca7083c:612864e0 Events : 0.37 I would appreciate very much any help with this. Thanks, Jaime. - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Multipath problems with 2.6.8.1 2004-09-09 15:59 ` Guy @ 2004-09-09 18:25 ` Jaime Peñalba 0 siblings, 0 replies; 4+ messages in thread From: Jaime Peñalba @ 2004-09-09 18:25 UTC (permalink / raw) To: linux-raid; +Cc: neilb Im using multipath for failover, not for round robin (rr over multipath isnt supported with the latest stable kernel), also i was wondering about how this should be configured before sending a mail to the list, so i tested both ways (as "2 raid disks" and as "raid disk with spare disk"), the good way is using a spare disk, or i think so. On raidtools2 there is an example for multipath and they use a spare disk, and it has sense, because it should act as a spare disk like on a raid 1/5, it uses the raid disk path, and if it fails, it uses the spare disk path. Anyway here is the output doing it as 2 raid disks 1) create md apache2:~# mdadm --create /dev/md0 --force --level multipath --raid-devices 2 /dev/sdb1 /dev/sdd1 mdadm: array /dev/md0 started. apache2:~# cat /proc/mdstat Personalities : [multipath] md0 : active multipath sdd1[1] sdb1[0] 10485632 blocks [2/2] [UU] unused devices: <none> --------- The output from dmesg md: bind<sdb1> md: bind<sdd1> multipath: array md0 active with 2 out of 2 IO paths And it should be something like this (configured with spare) md: bind<sdb1> md: bind<sdd1> multipath: array md0 active with 1 out of 1 IO paths MULTIPATH conf printout: --- wd:1 rd:1 disk0, o:1, dev:sdb1 MULTIPATH conf printout: --- wd:1 rd:1 disk0, o:1, dev:sdb1 2) stop md apache2:~# mdadm -S /dev/md0 3) start md again apache2:~# mdadm --assemble /dev/md0 /dev/sdb1 /dev/sdd mdadm: failed to add /dev/sdb1 to /dev/md0: Device or resource busy mdadm: /dev/md0 has been started with 2 drives and -1 spares. apache2:~# cat /proc/mdstat Personalities : [multipath] md0 : active multipath sdd1[0] 10485632 blocks [1/1] [U] unused devices: <none> ------------------------------- Superblocks info apache2:~# mdadm -E /dev/sdb1 /dev/sdb1: Magic : a92b4efc Version : 00.90.00 UUID : 57d730b7:49b3d124:b5d30806:127c5bc3 Creation Time : Thu Sep 9 19:49:10 2004 Raid Level : multipath Device Size : 10485632 (10.00 GiB 10.74 GB) Raid Devices : 2 Total Devices : 1 Preferred Minor : 0 Update Time : Thu Sep 9 20:16:37 2004 State : dirty Active Devices : 1 Working Devices : 1 Failed Devices : 1 Spare Devices : 0 Checksum : 9626eafd - correct Events : 0.45 Number Major Minor RaidDevice State this 0 8 49 0 active sync /dev/sdd1 0 0 8 49 0 active sync /dev/sdd1 1 1 0 0 1 faulty removed ----------------------- apache2:~# mdadm -E /dev/sdd1 /dev/sdd1: Magic : a92b4efc Version : 00.90.00 UUID : 57d730b7:49b3d124:b5d30806:127c5bc3 Creation Time : Thu Sep 9 19:49:10 2004 Raid Level : multipath Device Size : 10485632 (10.00 GiB 10.74 GB) Raid Devices : 2 Total Devices : 1 Preferred Minor : 0 Update Time : Thu Sep 9 20:16:37 2004 State : dirty Active Devices : 1 Working Devices : 1 Failed Devices : 1 Spare Devices : 0 Checksum : 9626eafd - correct Events : 0.45 Number Major Minor RaidDevice State this 0 8 49 0 active sync /dev/sdd1 0 0 8 49 0 active sync /dev/sdd1 1 1 0 0 1 faulty removed As you can see both paths points to the same disk, because sdb1 has the sdd1 superblock, that is the last superblock wroten. Jaime. Guy wrote: >Somehow you confused it! And me. > >You used multipath and spare, but only listed 2 devices. >I don't think a multipath array can have a spare disk. > >Are you sure the 2 paths point to the same disk? > >I have never user multipath, so I am just guessing. > >If you have no data you need to save yet, try this: >mdadm --create /dev/md0 --force --level multipath /dev/sdb1 /dev/sdd1 >or >mdadm --create /dev/md0 --force --level multipath --raid-devices=2 /dev/sdb1 >/dev/sdd1 > >Guy > >-----Original Message----- >From: linux-raid-owner@vger.kernel.org >[mailto:linux-raid-owner@vger.kernel.org] On Behalf Of Jaime Peñalba >Sent: Thursday, September 09, 2004 11:33 AM >To: linux-raid@vger.kernel.org >Cc: neilb@cse.unsw.edu.au >Subject: Multipath problems with 2.6.8.1 > >Hi, > >Im having some troubles with multipath on a 2.6.8.1 linux kernel. > >Im using 2 QLogic 2344 connected to the SAN, i think that my problem is >related to superblocks, because when i create a new multipath device, it >writes the superblock for both disks and really is the same disk trought >two paths. I have else tried to disable persistent superblock, but mdadm >doesnt support multipath with the build mode. > >Im doing it like this > >1) Start the md >apache1:~/soft/mdadm-1.7.0# mdadm --create /dev/md0 --force --level >multipath --raid-devices=1 /dev/sdb1 --spare-devices=1 /dev/sdd1 >mdadm: array /dev/md0 started. > >apache1:~/soft/mdadm-1.7.0# cat /proc/mdstat >Personalities : [multipath] >md0 : active multipath sdd1[1] sdb1[0] > 4882304 blocks [1/1] [U] > >unused devices: <none> > >This is ok and runs fine, But superblock is only at /dev/sdd1, so no >remount would be possible, or i think so... > >apache1:~/soft/mdadm-1.7.0# mdadm -E /dev/sdb1 >mdadm: No super block found on /dev/sdb1 (Expected magic a92b4efc, got >00000000) > >apache1:~/soft/mdadm-1.7.0# mdadm -E /dev/sdd1 >/dev/sdd1: > Magic : a92b4efc > Version : 00.90.00 > UUID : af3395fd:fac2b820:2ca7083c:612864e0 > Creation Time : Thu Sep 9 17:20:43 2004 > Raid Level : multipath > Device Size : 4882304 (4.66 GiB 5.00 GB) > Raid Devices : 1 > Total Devices : 2 >Preferred Minor : 0 > > Update Time : Thu Sep 9 17:20:43 2004 > State : dirty > Active Devices : 1 >Working Devices : 2 > Failed Devices : 0 > Spare Devices : 1 > Checksum : 63bc7489 - correct > Events : 0.36 > > > Number Major Minor RaidDevice State >this 1 8 49 1 spare /dev/sdd1 > 0 0 8 17 0 active sync /dev/sdb1 > 1 1 8 49 1 spare /dev/sdd1 > > > >2) Stop the md >apache1:~/soft/mdadm-1.7.0# mdadm -S /dev/md0 > > >3) Start the md again >apache1:~/soft/mdadm-1.7.0# mdadm --assemble /dev/md0 >--uuid=af3395fd:fac2b820:2ca7083c:612864e0 /dev/sdb1 /dev/sdd1 >mdadm: no RAID superblock on /dev/sdb1 >mdadm: /dev/sdb1 has wrong uuid. >mdadm: /dev/md0 has been started with 1 drive. > > >apache1:~/soft/mdadm-1.7.0# cat /proc/mdstat >Personalities : [multipath] >md0 : active multipath sdd1[0] > 4882304 blocks [1/1] [U] > >unused devices: <none> > >Now things arent working very well.... > >apache1:~/soft/mdadm-1.7.0# mdadm --detail /dev/md0 >/dev/md0: > Version : 00.90.01 > Creation Time : Thu Sep 9 17:20:43 2004 > Raid Level : multipath > Array Size : 4882304 (4.66 GiB 5.00 GB) > Raid Devices : 1 > Total Devices : 1 >Preferred Minor : 0 > Persistence : Superblock is persistent > > Update Time : Thu Sep 9 17:26:21 2004 > State : clean > Active Devices : 1 >Working Devices : 1 > Failed Devices : 0 > Spare Devices : 0 > > > Number Major Minor RaidDevice State > 0 8 49 0 active sync /dev/sdd1 > UUID : af3395fd:fac2b820:2ca7083c:612864e0 > Events : 0.37 > > >I would appreciate very much any help with this. > >Thanks, >Jaime. > > > - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Multipath problems with 2.6.8.1 2004-09-09 15:32 ` Multipath problems with 2.6.8.1 Jaime Peñalba 2004-09-09 15:59 ` Guy @ 2004-09-09 16:05 ` Jaime Peñalba 1 sibling, 0 replies; 4+ messages in thread From: Jaime Peñalba @ 2004-09-09 16:05 UTC (permalink / raw) To: linux-raid; +Cc: neilb [-- Attachment #1: Type: text/plain, Size: 7280 bytes --] Here is some different behavior, superblock is writed for both paths, and the superblock for the second path persists on both. 1) create md apache2:~# mdadm --create /dev/md0 -v --force --level multipath --raid-devices=1 /dev/sdb1 --spare-devices=1 /dev/sdd1 mdadm: array /dev/md0 started. md: bind<sdb1> md: bind<sdd1> multipath: array md0 active with 1 out of 1 IO paths MULTIPATH conf printout: --- wd:1 rd:1 disk0, o:1, dev:sdb1 MULTIPATH conf printout: --- wd:1 rd:1 disk0, o:1, dev:sdb1 apache2:~# mdadm --detail /dev/md0 /dev/md0: Version : 00.90.01 Creation Time : Thu Sep 9 17:57:32 2004 Raid Level : multipath Array Size : 10485632 (10.00 GiB 10.74 GB) Raid Devices : 1 Total Devices : 2 Preferred Minor : 0 Persistence : Superblock is persistent Update Time : Thu Sep 9 17:57:32 2004 State : clean Active Devices : 1 Working Devices : 2 Failed Devices : 0 Spare Devices : 1 Number Major Minor RaidDevice State 0 8 17 0 active sync /dev/sdb1 1 8 49 -1 spare /dev/sdd1 UUID : 2a8d2bd1:54255df5:5b4b62b5:136a6e34 Events : 0.42 ---------------------------------- apache2:~# cat /proc/mdstat Personalities : [multipath] md0 : active multipath sdd1[1] sdb1[0] 10485632 blocks [1/1] [U] unused devices: <none> ---------------------------------- apache2:~# mdadm -E /dev/sdb1 /dev/sdb1: Magic : a92b4efc Version : 00.90.00 UUID : 2a8d2bd1:54255df5:5b4b62b5:136a6e34 Creation Time : Thu Sep 9 17:57:32 2004 Raid Level : multipath Device Size : 10485632 (10.00 GiB 10.74 GB) Raid Devices : 1 Total Devices : 2 Preferred Minor : 0 Update Time : Thu Sep 9 17:57:32 2004 State : dirty Active Devices : 1 Working Devices : 2 Failed Devices : 0 Spare Devices : 1 Checksum : 19b4a54c - correct Events : 0.42 Number Major Minor RaidDevice State this 1 8 49 1 spare /dev/sdd1 0 0 8 17 0 active sync /dev/sdb1 1 1 8 49 1 spare /dev/sdd1 ---------------------------------- apache2:~# mdadm -E /dev/sdd1 /dev/sdd1: Magic : a92b4efc Version : 00.90.00 UUID : 2a8d2bd1:54255df5:5b4b62b5:136a6e34 Creation Time : Thu Sep 9 17:57:32 2004 Raid Level : multipath Device Size : 10485632 (10.00 GiB 10.74 GB) Raid Devices : 1 Total Devices : 2 Preferred Minor : 0 Update Time : Thu Sep 9 17:57:32 2004 State : dirty Active Devices : 1 Working Devices : 2 Failed Devices : 0 Spare Devices : 1 Checksum : 19b4a54c - correct Events : 0.42 Number Major Minor RaidDevice State this 1 8 49 1 spare /dev/sdd1 0 0 8 17 0 active sync /dev/sdb1 1 1 8 49 1 spare /dev/sdd1 2) stop md mdadm -S /dev/md0 3) start md again apache2:~# mdadm --assemble /dev/md0 --uuid=2a8d2bd1:54255df5:5b4b62b5:136a6e34 /dev/sdb1 /dev/sdd1 mdadm: failed to add /dev/sdb1 to /dev/md0: Device or resource busy mdadm: /dev/md0 has been started with 1 drive. --------------- md: bind<sdd1> md: export_rdev(sdb1) multipath: array md0 active with 1 out of 1 IO paths --------------- apache2:~# mdadm --detail /dev/md0 /dev/md0: Version : 00.90.01 Creation Time : Thu Sep 9 17:57:32 2004 Raid Level : multipath Array Size : 10485632 (10.00 GiB 10.74 GB) Raid Devices : 1 Total Devices : 1 Preferred Minor : 0 Persistence : Superblock is persistent Update Time : Thu Sep 9 18:00:28 2004 State : clean Active Devices : 1 Working Devices : 1 Failed Devices : 0 Spare Devices : 0 Number Major Minor RaidDevice State 0 8 49 0 active sync /dev/sdd1 UUID : 2a8d2bd1:54255df5:5b4b62b5:136a6e34 Events : 0.43 Jaime. Jaime Peñalba wrote: > Hi, > > Im having some troubles with multipath on a 2.6.8.1 linux kernel. > > Im using 2 QLogic 2344 connected to the SAN, i think that my problem > is related to superblocks, because when i create a new multipath > device, it writes the superblock for both disks and really is the same > disk trought two paths. I have else tried to disable persistent > superblock, but mdadm doesnt support multipath with the build mode. > > Im doing it like this > > 1) Start the md > apache1:~/soft/mdadm-1.7.0# mdadm --create /dev/md0 --force --level > multipath --raid-devices=1 /dev/sdb1 --spare-devices=1 /dev/sdd1 > mdadm: array /dev/md0 started. > > apache1:~/soft/mdadm-1.7.0# cat /proc/mdstat > Personalities : [multipath] > md0 : active multipath sdd1[1] sdb1[0] > 4882304 blocks [1/1] [U] > unused devices: <none> > > This is ok and runs fine, But superblock is only at /dev/sdd1, so no > remount would be possible, or i think so... > > apache1:~/soft/mdadm-1.7.0# mdadm -E /dev/sdb1 > mdadm: No super block found on /dev/sdb1 (Expected magic a92b4efc, got > 00000000) > > apache1:~/soft/mdadm-1.7.0# mdadm -E /dev/sdd1 > /dev/sdd1: > Magic : a92b4efc > Version : 00.90.00 > UUID : af3395fd:fac2b820:2ca7083c:612864e0 > Creation Time : Thu Sep 9 17:20:43 2004 > Raid Level : multipath > Device Size : 4882304 (4.66 GiB 5.00 GB) > Raid Devices : 1 > Total Devices : 2 > Preferred Minor : 0 > > Update Time : Thu Sep 9 17:20:43 2004 > State : dirty > Active Devices : 1 > Working Devices : 2 > Failed Devices : 0 > Spare Devices : 1 > Checksum : 63bc7489 - correct > Events : 0.36 > > > Number Major Minor RaidDevice State > this 1 8 49 1 spare /dev/sdd1 > 0 0 8 17 0 active sync /dev/sdb1 > 1 1 8 49 1 spare /dev/sdd1 > > > > 2) Stop the md > apache1:~/soft/mdadm-1.7.0# mdadm -S /dev/md0 > > > 3) Start the md again > apache1:~/soft/mdadm-1.7.0# mdadm --assemble /dev/md0 > --uuid=af3395fd:fac2b820:2ca7083c:612864e0 /dev/sdb1 /dev/sdd1 > mdadm: no RAID superblock on /dev/sdb1 > mdadm: /dev/sdb1 has wrong uuid. > mdadm: /dev/md0 has been started with 1 drive. > > > apache1:~/soft/mdadm-1.7.0# cat /proc/mdstat > Personalities : [multipath] > md0 : active multipath sdd1[0] > 4882304 blocks [1/1] [U] > unused devices: <none> > > Now things arent working very well.... > > apache1:~/soft/mdadm-1.7.0# mdadm --detail /dev/md0 > /dev/md0: > Version : 00.90.01 > Creation Time : Thu Sep 9 17:20:43 2004 > Raid Level : multipath > Array Size : 4882304 (4.66 GiB 5.00 GB) > Raid Devices : 1 > Total Devices : 1 > Preferred Minor : 0 > Persistence : Superblock is persistent > > Update Time : Thu Sep 9 17:26:21 2004 > State : clean > Active Devices : 1 > Working Devices : 1 > Failed Devices : 0 > Spare Devices : 0 > > > Number Major Minor RaidDevice State > 0 8 49 0 active sync /dev/sdd1 > UUID : af3395fd:fac2b820:2ca7083c:612864e0 > Events : 0.37 > > > I would appreciate very much any help with this. > > Thanks, > Jaime. 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[not found] <S265098AbUIIOeH/20040909143407Z+1912@vger.kernel.org>
2004-09-09 15:32 ` Multipath problems with 2.6.8.1 Jaime Peñalba
2004-09-09 15:59 ` Guy
2004-09-09 18:25 ` Jaime Peñalba
2004-09-09 16:05 ` Jaime Peñalba
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