Dear James, dear all,
this is to let you know that I'll not pursue this issue further. I spent some
days building a test system, but I could not reproduce the error.
There's a tool named HUGO by HGST/Western Digital to re-configure the HDD's
firmware to use 512byte blocks, which solved the problem for me.
Sorry about the bad news.
Yours,
Sebastian
Am 14.06.2018 um 14:11 schrieb Sebastian Hegler
<sebastian.heg...@tu-dresden.de>:
> Dear James, dear all!
>
> Am 11.06.2018 um 17:06 schrieb James Bottomley
> <james.bottom...@hansenpartnership.com>:
>> This means that somehow, something sent a non 4k aligned 4k sized
>> request. SCSI here is just the messenger. However, if you apply this
>> patch, it will capture the stack trace of what above it triggered this,
>> which may help us in debugging. It could be we may also want to see
>> what the values of block and blk_rq_sectors(rq) actually are, but lets
>> begin with the stack trace.
>> ---
>>
>> diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
>> index 9421d9877730..ac865e048533 100644
>> --- a/drivers/scsi/sd.c
>> +++ b/drivers/scsi/sd.c
>> @@ -1109,6 +1109,7 @@ static int sd_setup_read_write_cmnd(struct scsi_cmnd
>> *SCpnt)
>> if ((block & 7) || (blk_rq_sectors(rq) & 7)) {
>> scmd_printk(KERN_ERR, SCpnt,
>> "Bad block number requested\n");
>> + WARN_ON_ONCE(1);
>> goto out;
>> } else {
>> block = block >> 3;
> I'll give that a try. But don't expect to hear from me soon, I'll need to
> build a test system for that. The error occurred in a production system,
> which I am very hesitant to re-boot, let alone insert drives that cause error
> messages.
>
> Yours sincerely,
> Sebastian
