Re: SSD - trim fails

On Thu, Nov 3, 2022 at 4:09 PM Daniel Engberg <diizzy@freebsd.org> wrote:

> On 2022-11-03 23:02, Warner Losh wrote:
>
>
>
> On Wed, Nov 2, 2022 at 2:51 PM Wojciech Puchar <wojtek@puchar.net> wrote:
>
> i have laptop with such SSD drive
>
> ada0 at ahcich0 bus 0 scbus0 target 0 lun 0
> ada0: <SAMSUNG SSD SM841N 2.5 7mm 256GB DXM03D0Q> ACS-2 ATA SATA 3.x
> device
> ada0: Serial Number S1K1NSAF415536
> ada0: 600.000MB/s transfers (SATA 3.x, UDMA6, PIO 8192bytes)
> ada0: Command Queueing enabled
> ada0: 244198MB (500118192 512 byte sectors)
>
>
> everything works very good as long as i don't do trim
>
> when trying trim - for example cleaning all drive with trim -f /dev/ada0
> i'm getting
>
> (ada0:ahcich0:0:0:0): Retrying command, 3 more tries remain
> (ada0:ahcich0:0:0:0): SEND_FPDMA_QUEUED DATA SET MANAGEMENT. ACB: 64 01 00
> 00 00 40 00 00 00 00 00 00
> (ada0:ahcich0:0:0:0): CAM status: Uncorrectable parity/CRC error
> (ada0:ahcich0:0:0:0): Retrying command, 3 more tries remain
> (ada0:ahcich0:0:0:0): SEND_FPDMA_QUEUED DATA SET MANAGEMENT. ACB: 64 01 00
> 00 00 40 00 00 00 00 00 00
> (ada0:ahcich0:0:0:0): CAM status: Uncorrectable parity/CRC error
> (ada0:ahcich0:0:0:0): Retrying command, 3 more tries remain
> (ada0:ahcich0:0:0:0): SEND_FPDMA_QUEUED DATA SET MANAGEMENT. ACB: 64 01 00
> 00 00 40 00 00 00 00 00 00
> (ada0:ahcich0:0:0:0): CAM status: Uncorrectable parity/CRC error
> (ada0:ahcich0:0:0:0): Retrying command, 3 more tries remain
> (ada0:ahcich0:0:0:0): SEND_FPDMA_QUEUED DATA SET MANAGEMENT. ACB: 64 01 00
> 00 00 40 00 00 00 00 00 00
> (ada0:ahcich0:0:0:0): CAM status: Uncorrectable parity/CRC error
> (ada0:ahcich0:0:0:0): Retrying command, 3 more tries remain
> (ada0:ahcich0:0:0:0): SEND_FPDMA_QUEUED DATA SET MANAGEMENT. ACB: 64 01 00
> 00 00 40 00 00 00 00 00 00
> (ada0:ahcich0:0:0:0): CAM status: Uncorrectable parity/CRC error
> (ada0:ahcich0:0:0:0): Retrying command, 3 more tries remain
> (ada0:ahcich0:0:0:0): SEND_FPDMA_QUEUED DATA SET MANAGEMENT. ACB: 64 01 00
> 00 00 40 00 00 00 00 00 00
> (ada0:ahcich0:0:0:0): CAM status: Uncorrectable parity/CRC error
>
>
> any ideas what is a problem?
>
>
> The drive is reporting that it supports SDM. However, it's returning a
> weird error code
> when fed the DSM we're sending it.
>
> First, it could be a bug in how it does queued DSM requests. Normally one
> can queue
> up a bunch of trim requests on newer drives. Perhaps this one gets cranky.
>
> Next, maybe the drive is lying the size of the DSM it will support, but
> again, this is a weird
> message to report a request that's too long with.
>
> Maybe it doesn't support queued DSM, despite all appearances to the
> contrary from its
> identify tables. Try setting the trem method to DSM_TRIM:
> # sysctl kern.cam.ada.0.delete_method=DSM_TRIM
> should do the trick. At the very least, that will change the command we
> send so if it can't
> handle that, then the error message will change. I suspect this may clear
> up the problem.
>
> There's a few other things it can be, but if it is only trim commands that
> suffer from this, then
> they are quite unlikely.
>
> Warner
>
> There are a number of SSDs from Samsung that have TRIM disabled so maybe
> this also falls into that category?
>
> https://bugzilla.kernel.org/show_bug.cgi?id=201693#c87
>

Likely. I haven't checked Linux's block list for this yet.

Warner