<![CDATA[Pool Master]]>I need to reboot one of my host servers which is the pool master. There are no VMs on it. I went to Change the pool master to another server last night and got the error "Internal Error - Missing Column". The Pool master has been updated along with 2 (Out of 4 total) of the other host have been updated. The host than I am trying to move the pool master to is up to date as well.

]]>https://xcp-ng.org/forum/topic/11049/pool-masterRSS for NodeFri, 16 Oct 2026 03:30:06 GMTTue, 08 Jul 2025 14:19:10 GMT60<![CDATA[Reply to Pool Master on Tue, 08 Jul 2025 20:01:45 GMT]]>@olivierlambert Dang ok. I waited a few minute then clicked the Connect in XOA for that host and it connected. Not sure what to do really.

]]>https://xcp-ng.org/forum/post/95079https://xcp-ng.org/forum/post/95079Tue, 08 Jul 2025 20:01:45 GMT<![CDATA[Reply to Pool Master on Tue, 08 Jul 2025 19:52:45 GMT]]>You have an issue with your storage configuration. It's hard to tell more without knowing more or digging more.

]]>https://xcp-ng.org/forum/post/95077https://xcp-ng.org/forum/post/95077Tue, 08 Jul 2025 19:52:45 GMT<![CDATA[Reply to Pool Master on Tue, 08 Jul 2025 19:51:15 GMT]]>I rebooted the pool master. Even though it looks like it came up ok it is not connected to storage. In xcp-ng center it is showing a red X for the SR and this is the errors in dmesg.

[Tue Jul  8 14:43:19 2025] Loading iSCSI transport class v2.0-870.
[Tue Jul  8 14:43:19 2025] iscsi: registered transport (tcp)
[Tue Jul  8 14:43:20 2025] scsi host7: iSCSI Initiator over TCP/IP
[Tue Jul  8 14:43:20 2025] scsi 7:0:0:1: Direct-Access     SYNOLOGY Storage          4.0  PQ: 0 ANSI: 5
[Tue Jul  8 14:43:20 2025] scsi 7:0:0:1: alua: supports implicit TPGS
[Tue Jul  8 14:43:20 2025] scsi 7:0:0:1: alua: device naa.60014059c706a83d1e77d47a8da5c5d1 port group 0 rel port 1
[Tue Jul  8 14:43:20 2025] sd 7:0:0:1: Attached scsi generic sg1 type 0
[Tue Jul  8 14:43:20 2025] sd 7:0:0:1: alua: transition timeout set to 60 seconds
[Tue Jul  8 14:43:20 2025] sd 7:0:0:1: alua: port group 00 state A non-preferred supports TOlUSNA
[Tue Jul  8 14:43:25 2025] sd 7:0:0:1: [sdb] 26109542400 512-byte logical blocks: (13.4 TB/12.2 TiB)
[Tue Jul  8 14:43:25 2025] sd 7:0:0:1: [sdb] Write Protect is off
[Tue Jul  8 14:43:25 2025] sd 7:0:0:1: [sdb] Mode Sense: 43 00 10 08
[Tue Jul  8 14:43:25 2025] sd 7:0:0:1: [sdb] Write cache: enabled, read cache: enabled, supports DPO and FUA
[Tue Jul  8 14:43:25 2025] sd 7:0:0:1: [sdb] Attached SCSI disk
[Tue Jul  8 14:43:26 2025] sd 7:0:0:1: [sdb] Synchronizing SCSI cache
[Tue Jul  8 14:43:32 2025] Buffer I/O error on dev sdb, logical block 3263692798, async page read
[Tue Jul  8 14:43:32 2025] scsi 7:0:0:1: alua: Detached
[Tue Jul  8 14:43:40 2025] scsi host7: iSCSI Initiator over TCP/IP
[Tue Jul  8 14:43:40 2025] scsi 7:0:0:1: Direct-Access     SYNOLOGY Storage          4.0  PQ: 0 ANSI: 5
[Tue Jul  8 14:43:40 2025] scsi 7:0:0:1: alua: supports implicit TPGS
[Tue Jul  8 14:43:40 2025] scsi 7:0:0:1: alua: device naa.60014059c706a83d1e77d47a8da5c5d1 port group 0 rel port 1
[Tue Jul  8 14:43:40 2025] sd 7:0:0:1: Attached scsi generic sg1 type 0
[Tue Jul  8 14:43:40 2025] sd 7:0:0:1: alua: transition timeout set to 60 seconds
[Tue Jul  8 14:43:40 2025] sd 7:0:0:1: alua: port group 00 state A non-preferred supports TOlUSNA
[Tue Jul  8 14:43:46 2025] sd 7:0:0:1: [sdb] 26109542400 512-byte logical blocks: (13.4 TB/12.2 TiB)
[Tue Jul  8 14:43:46 2025] sd 7:0:0:1: [sdb] Write Protect is off
[Tue Jul  8 14:43:46 2025] sd 7:0:0:1: [sdb] Mode Sense: 43 00 10 08
[Tue Jul  8 14:43:46 2025] sd 7:0:0:1: [sdb] Write cache: enabled, read cache: enabled, supports DPO and FUA
[Tue Jul  8 14:43:49 2025] ldm_validate_partition_table(): Disk read failed.
[Tue Jul  8 14:43:49 2025]  sdb: unable to read partition table
[Tue Jul  8 14:43:49 2025] sd 7:0:0:1: [sdb] Attached SCSI disk
[Tue Jul  8 14:43:49 2025] sd 7:0:0:1: [sdb] Synchronizing SCSI cache
[Tue Jul  8 14:43:49 2025] scsi 7:0:0:1: alua: Detached
]]>https://xcp-ng.org/forum/post/95074https://xcp-ng.org/forum/post/95074Tue, 08 Jul 2025 19:51:15 GMT<![CDATA[Reply to Pool Master on Tue, 08 Jul 2025 14:40:54 GMT]]>Ok. Thank you, I appreciate it!

]]>https://xcp-ng.org/forum/post/95036https://xcp-ng.org/forum/post/95036Tue, 08 Jul 2025 14:40:54 GMT<![CDATA[Reply to Pool Master on Tue, 08 Jul 2025 14:32:58 GMT]]>No, it's perfectly fine to reboot the master. Obviously, without HA enabled on the pool.

]]>https://xcp-ng.org/forum/post/95033https://xcp-ng.org/forum/post/95033Tue, 08 Jul 2025 14:32:58 GMT<![CDATA[Reply to Pool Master on Tue, 08 Jul 2025 14:31:50 GMT]]>@olivierlambert Ok, just reboot the master won't cause any issues?

]]>https://xcp-ng.org/forum/post/95032https://xcp-ng.org/forum/post/95032Tue, 08 Jul 2025 14:31:50 GMT<![CDATA[Reply to Pool Master on Tue, 08 Jul 2025 14:29:10 GMT]]>Hi,

You don't switch the master while doing upgrades in a pool. Just reboot it.

]]>https://xcp-ng.org/forum/post/95031https://xcp-ng.org/forum/post/95031Tue, 08 Jul 2025 14:29:10 GMT