Details
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Bug
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Resolution: Done
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Major
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None
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7.1
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None
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Fujitsu Blade Server BX820_M2 with additional Mezzanine card added. The Mezzanine card add Intel 82599 10Gb nics for the blade.
Description
kern.log errors:
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Jun 9 14:35:00 blade-server8 kernel: [14298.088668] sd 7:0:0:11: [sdb] tag#0 CDB: Read(10) 28 00 12 d1 95 90 00 05 10 00
Jun 9 14:35:00 blade-server8 kernel: [14298.088671] blk_update_request: critical medium error, dev sdb, sector 315725200
Jun 9 14:35:00 blade-server8 kernel: [14298.088697] blk_update_request: critical medium error, dev dm-1, sector 315725200
Jun 9 14:35:01 blade-server8 kernel: [14299.091910] sd 7:0:0:11: [sdb] tag#0 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
Jun 9 14:35:01 blade-server8 kernel: [14299.091927] sd 7:0:0:11: [sdb] tag#0 Sense Key : Medium Error [current]
Jun 9 14:35:01 blade-server8 kernel: [14299.091931] sd 7:0:0:11: [sdb] tag#0 Add. Sense: Unrecovered read error
Jun 9 14:35:01 blade-server8 kernel: [14299.091935] sd 7:0:0:11: [sdb] tag#0 CDB: Read(10) 28 00 12 d1 95 90 00 05 10 00
Jun 9 14:35:01 blade-server8 kernel: [14299.091938] blk_update_request: critical medium error, dev sdb, sector 315725200
Jun 9 14:35:01 blade-server8 kernel: [14299.091955] blk_update_request: critical medium error, dev dm-1, sector 315725200
Jun 9 14:35:02 blade-server8 kernel: [14300.080796] sd 7:0:0:11: [sdb] tag#0 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
Jun 9 14:35:02 blade-server8 kernel: [14300.080810] sd 7:0:0:11: [sdb] tag#0 Sense Key : Medium Error [current]
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XenServer 6.5 ran perfect. Upgraded to XenServer 7.1 and intel 82599's used for 10Gb connectivity to storage could access iSCSI LUN's, I could create my SR, I could even add a vdi and attach it to a VM. The problem was throughput. CrystalDiskMark on a Windows VM just returned an error since throughput was almost non-existent. Did many install/reinstalls and comparisons with 6.5/7.1 and found that max_sectors_kb was 512 for XenServer 6.5 and for some reason 1280 on XenServer 7.1. As soon as I changed max_sectors_kb for XenServer 7.1 all was well again for my 10Gb storage.
I don't know what/how that setting gets assigned, I am assuming when an SR is created , but for my 82599's it was incorrectly set to 1280.
-Alan-
