Re: Lost partition tables on ide-hd + ahci drive

[Simon Rowe]

On Thursday, 15 June 2023 Fiona Ebner wrote:

 

> which version/build of QEMU are you using? Can you correlate the issue
> with any block job or was the drive in use by the guest only?

I believe this has been seen on a range of releases so that includes QEMU 4.2 and 2.12. We do have custom patches but nothing in the SATA/AHCI code.

 

I’m not familiar with the storage backend but in the RCA for one of the incidents the engineer identified an explicit write that hit the MBR. This seems to suggest QEMU is mistakenly translating a normal guest write to sector 0, probably following an earlier write failure.

 

Regards

Simon