Re: [Xen-API] vhd_read_short_footer failed

[George Shuklin <george.shuklin@xxxxxxxxx>]

Good day.

I've never resize LV inside XCP LVM, I'm sure about this.

I've getting those messages for many SR's in XCP 0.5 (yep, still in product) and in XCP 1.1.

Here samples for few VDI's with this message:

Âvhd-util: libvhd::vhd_validate_footer: invalid footer cookie: ÃÃÃÃÃÃÃÃ
Âvhd-util: libvhd::vhd_read_footer_at: /dev/VG_XenStorage-309127d3-61a1-9c8d-ceb5-486c608c58aa/VHD-16ee54bb-9c47-4edf-8cc9-e6ddc6bf7c6b: reading footer at 0x281bffe00 failed: -22
Âvhd-util: libvhd::vhd_read: /dev/VG_XenStorage-309127d3-61a1-9c8d-ceb5-486c608c58aa/VHD-16ee54bb-9c47-4edf-8cc9-e6ddc6bf7c6b: read of 512 returned 0, errno: -22


vhd-util: libvhd::vhd_read_short_footer: /dev/VG_XenStorage-301127d3-61a1-9c8d-ceb5-486c608c58aa/VHD-16ee54bb-9c47-4edf-8cc9-e6ddc6bf7c6b: failed reading short footer: -22

xe vdi-list uuid=16ee54bb-9c47-4edf-8cc9-e6ddc6bf7c6b params=virtual-size,physical-utilisation
virtual-size ( RO)ÂÂÂÂÂÂÂÂÂÂÂ : 10737418240
ÂÂÂ physical-utilisation ( RO): 10766778368

lvdisplay /dev/VG_XenStorage-309127d3-61a1-9c8d-ceb5-486c608c58aa/VHD-16ee54bb-9c47-4edf-8cc9-e6ddc6bf7c6b
 --- Logical volume ---
 LV Name /dev/VG_XenStorage-309127d3-61a1-9c8d-ceb5-486c608c58aa/VHD-16ee54bb-9c47-4edf-8cc9-e6ddc6bf7c6b
 VG Name VG_XenStorage-309127d3-61a1-9c8d-ceb5-486c608c58aa
 LV UUID YaXNrJ-GOYV-z0WO-3pq6-y5Fm-3TW1-R7W0Mf
 LV Write Access read/write
 LV Status available
 # open 1
 LV Size 10.03 GB
 Current LE 2567
 Segments 2
 Allocation inherit
 Read ahead sectors auto
 - currently set to 1024
 Block device 252:16


Can this be due physcal-utilization != virtual-size?

Anyway, what consequences I can met with those messages?

Thanks.


On 01.03.2012 20:09, Andrei Lifchits wrote:

Hi George,

Â

This could happen if the Logical Volume was incorrectly resized (e.g. manually). The messages log might give you some more information. Check that the LV size corresponds to the virtual size. It could also be a genuine corruption for some other reason. What were you doing when you got this error?

Â

Andrei

Â

From: George Shuklin <george.shuklin@xxxxxxxxx>
Date: February 29, 2012 10:44:26 PM GMT
To: "xen-api@xxxxxxxxxxxxxxxxxxx" <xen-api@xxxxxxxxxxxxxxxxxxx>
Subject: [Xen-API] vhd_read_short_footer failed

Good day.

Got message for few VDI's:

vhd-util: libvhd::vhd_read_footer_at:
/dev/VG_XenStorage-10214763-7181-9980-b0b5-688c900c482a/VHD-95e28517-c063-40c1-b2db-20eceadfae14:
reading footer at 0x4027ffe00 failed: -22

I'm not really well understand their meaning... Is VHD chain broken? Or
something else? I got them for VDI on ISCSI SR without snapshotes...



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