[Xen-users] iSCSI initiator problems accessing Infortrend storage

["Werner Kuballa" <wkuballa@xxxxxxxxxxxxxxxxx>]

I am trying to use two Infortrend iSCSI systems (A16E-G2130-4, each with 16x750GB in Raid 6) for our Oracle VM environment (three big Dell R900 servers).  When I copy files on the Infortrend I receive SCSI errors, resulting in loss of connection.  I read some postings to this user group indicating that others are successfully using Infortrend storage systems.  However, I have tried pretty much everything I can think of, but can not get the Infortrend working reliably with Dom0.  This is what I have tried:

- simple iSCSI network connection, just one server connected with only one 1Gb Ethernet NIC to the Infortrend (exclusively no other connections on the Infortrend)

- when installing Oracle Enterprise Linux 5.3 natively on the R900, the Infortrend works fine - in all

different network connections (single connection, bonded NICs, etc.)

- accessing an EMC AX4 iSCSI system works without any problems

No matter what I tried, when utilizing the Infortrend in Dom0 I always get errors as shown below.  And it gets worse when I am using "ocfs2" (what I eventually have to use) - ocfs2 fences off the system when these errors occur and reboots the server.

Infortrend Support has no solution for this problem, they maintain that XEN is not a supported platform.

Any suggestions would be appreciated.

Regards,

Werner

Aug 27 05:16:24 ovm3 multipathd: IFT110: load table [0 8787689472 multipath 1 queue_if_no_path 0 1 1 round-robin 0 1 1 8:48 100]

 

Aug 27 05:16:24 ovm3 multipathd: IFT110: event checker started

Aug 27 05:16:24 ovm3 multipathd: dm-0: add map (uevent)

Aug 27 05:16:24 ovm3 multipathd: dm-0: devmap already registered

Aug 27 05:16:24 ovm3 multipathd: dm-1: add map (uevent)

Aug 27 05:16:24 ovm3 multipathd: dm-1: devmap already registered

Aug 27 05:16:25 ovm3 iscsid: received iferror -38

Aug 27 05:16:25 ovm3 last message repeated 2 times

Aug 27 05:16:25 ovm3 iscsid: connection1:0 is operational now

Aug 27 05:18:08 ovm3 kernel: kjournald starting.  Commit interval 5 seconds

Aug 27 05:18:08 ovm3 kernel: EXT3 FS on dm-1, internal journal

Aug 27 05:18:08 ovm3 kernel: EXT3-fs: mounted filesystem with ordered data mode.

Aug 27 05:19:16 ovm3 kernel: ping timeout of 5 secs expired, last rx 13940, last ping 15190, now 16440

Aug 27 05:19:16 ovm3 kernel:  connection1:0: iscsi: detected conn error (1011)

Aug 27 05:19:17 ovm3 kernel: sd 4:0:0:1: SCSI error: return code = 0x00020000

Aug 27 05:19:17 ovm3 kernel: end_request: I/O error, dev sdd, sector 49529536

Aug 27 05:19:17 ovm3 kernel: device-mapper: multipath: Failing path 8:48.

Aug 27 05:19:17 ovm3 kernel: sd 4:0:0:1: SCSI error: return code = 0x00020000

Aug 27 05:19:17 ovm3 kernel: end_request: I/O error, dev sdd, sector 1569783144

Aug 27 05:19:17 ovm3 kernel: sd 4:0:0:1: SCSI error: return code = 0x00020000

Aug 27 05:19:17 ovm3 kernel: end_request: I/O error, dev sdd, sector 1569784168

Aug 27 05:19:17 ovm3 kernel: sd 4:0:0:1: SCSI error: return code = 0x00020000

Aug 27 05:19:17 ovm3 kernel: end_request: I/O error, dev sdd, sector 1569785192

Aug 27 05:19:17 ovm3 kernel: sd 4:0:0:1: SCSI error: return code = 0x00020000

Aug 27 05:19:17 ovm3 kernel: end_request: I/O error, dev sdd, sector 1569786216

Aug 27 05:19:17 ovm3 kernel: sd 4:0:0:1: SCSI error: return code = 0x00020000

Aug 27 05:19:17 ovm3 kernel: end_request: I/O error, dev sdd, sector 1569786224

Aug 27 05:19:17 ovm3 kernel: sd 4:0:0:1: SCSI error: return code = 0x00020000

Aug 27 05:19:17 ovm3 kernel: end_request: I/O error, dev sdd, sector 1569787248

Aug 27 05:19:17 ovm3 iscsid: Kernel reported iSCSI connection 1:0 error (1011) state (3)

Aug 27 05:19:17 ovm3 kernel: sd 4:0:0:1: SCSI error: return code = 0x00020000

Aug 27 05:19:17 ovm3 kernel: end_request: I/O error, dev sdd, sector 1569788272

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