Never mind, I found the issue
hw.ata.ata_dma=0
hw.ata.atapi_dma=0
in /boot/loader.conf, hanging around from the days of wood burning power
supplies was causing this strange behaviour! Sorry for the noise folks!
---Mike
On 8/22/2018 12:17 PM, Mike Tancsa wrote:
> OK,
> Some more odd things going on. If I write to a file from dd some random
> junk, not all of the file is saved when I do an unmount. This seems to
> be specific either to the ata controller of the APU or to the msata disk
> as I tested on a regular server with plain old disks and no issue
>
> Eric, any chance you can try this on your APU as well ?
>
>
> 0# umount /mnt
> 0# mount /dev/ada0p1 /mnt
> 0# dd if=/dev/urandom of=/mnt/junk2 bs=512k count=4
> 4+0 records in
> 4+0 records out
> 2097152 bytes transferred in 0.101394 secs (20683253 bytes/sec)
> 0# md5 /mnt/junk2
> MD5 (/mnt/junk2) = acca1d8997c3b9d906b40d99cba734b6
> 0# hd /mnt/junk2 > /tmp/hd-junk2
> 0# ls -l /mnt/junk2
> -rw------- 1 root wheel - 2097152 Aug 22 11:53 /mnt/junk2
> 0# umount /mnt
> 0# mount /dev/ada0p1 /mnt
> 0# md5 /mnt/junk2
> MD5 (/mnt/junk2) = 2ef0cadf32db4e07a8edf4fc66f8a4eb
> 0# ls -l /mnt/junk2
> -rw------- 1 root wheel - 2097152 Aug 22 11:53 /mnt/junk2
> 0# hd /mnt/junk2 > /tmp/hd-junk2-post-mount
> 0# ls -l /tmp/hd-junk2*
> -rw------- 1 root wheel - 10354697 Aug 22 11:54 /tmp/hd-junk2
> -rw------- 1 root wheel - 1941594 Aug 22 11:54 /tmp/hd-junk2-post-mount
> 0#
>
> If I do the same test on a USB stick it works as expected
>
> 0# umount /mnt
> 0# mount /dev/da0p1 /mnt
> 0# dd if=/dev/urandom of=/mnt/junk2 bs=512k count=4
> 4+0 records in
> 4+0 records out
> 2097152 bytes transferred in 0.102256 secs (20508777 bytes/sec)
> 0# md5 /mnt/junk2
> MD5 (/mnt/junk2) = 51190332cdd4ef898bdc9c2520a9f749
> 0# umount /mnt
> 0# mount /dev/da0p1 /mnt
> 0# md5 /mnt/junk2
> MD5 (/mnt/junk2) = 51190332cdd4ef898bdc9c2520a9f749
> 0#
> Same with an SD card. All is OK
>
> 0# umount /mnt
> 0# mount /dev/mmcsd0s2a /mnt
> 0# dd if=/dev/urandom of=/mnt/junk2 bs=512k count=4
> 4+0 records in
> 4+0 records out
> 2097152 bytes transferred in 0.107400 secs (19526588 bytes/sec)
> 0# md5 /mnt/junk2
> MD5 (/mnt/junk2) = 0811af4e57ab5a3bc224e5b8f8b3bc29
> 0# umount /mnt
> 0# mount /dev/mmcsd0s2a /mnt
> 0# md5 /mnt/junk2
> MD5 (/mnt/junk2) = 0811af4e57ab5a3bc224e5b8f8b3bc29
> 0#
>
> Looking at hd before and after, its missing the end of the file
>
> --- hd-junk2 2018-08-22 11:54:09.891572000 -0400
> +++ hd-junk2-post-mount 2018-08-22 11:54:41.996983000 -0400
> @@ -24574,106500 +24574,6 @@
> 0005ffd0 8b 71 87 b8 78 03 72 ca 0e 06 3b d4 31 fd 18 f8
> |.q..x.r...;.1...|
> 0005ffe0 de 39 72 fb c8 39 fd 1f 93 75 10 de 05 56 43 fb
> |.9r..9...u...VC.|
> 0005fff0 40 ce 54 e2 a4 17 3e 1e ec 01 b7 fd 1b 69 b7 6f
> |@.T...>......i.o|
> -00060000 91 f3 02 ea 95 f4 12 1c bf 00 68 1b 3d 8c 01 43
> |..........h.=..C|
> -00060010 f6 5b 4e ec 7f 37 19 15 5b c4 e6 fb 88 27 1c 54
> |.[N..7..[....'.T|
> -00060020 15 6c 02 7d fb 00 06 c1 4a 4a bf ce 9a 1b fe d4
> |.l.}....JJ......|
> -00060030 1c 3c b5 05 b6 4f 4e 62 b5 03 e3 e7 5e 27 d6 71
> |.<...ONb....^'.q|
> -00060040 ea 22 00 99 9d 13 e8 a9 64 0e fd 13 cc 23 73 67
> |."......d....#sg|
> -00060050 8e 78 0a ad ae 70 ab e4 22 b4 b7 b9 3b 75 9f 85
> |.x...p.."...;u..|
> -00060060 53 39 0c af 15 39 5f 04 ac 3c 65 e9 ea 29 1d b7
> |S9...9_..<e..)..|
> -00060070 ea f0 2f 19 3c 6d 1c 21 f1 58 4a 4b a8 26 8e f6
> |../.<m.!.XJK.&..|
> -00060080 05 99 8a 9d 54 75 e4 77 78 78 6c 75 21 31 d4 0c
> |....Tu.wxxlu!1..|
> -00060090 52 88 c6 65 c0 09 04 ce 7f 5f 29 0c 46 9a 68 13
> |R..e....._).F.h.|
> -000600a0 73 30 97 78 d7 b7 d2 ba 8f 73 27 58 3d eb 0c d6
> |s0.x.....s'X=...|
>
>
> 1# camcontrol identify ada0
> pass0: <SATA SSD S9FM02.0> ACS-3 ATA SATA 3.x device
> pass0: 600.000MB/s transfers (SATA 3.x, PIO4, PIO 8192bytes)
>
> protocol ATA/ATAPI-10 SATA 3.x
> device model SATA SSD
> firmware revision S9FM02.0
> serial number 81B5074C1B6500076878
> cylinders 16383
> heads 16
> sectors/track 63
> sector size logical 512, physical 512, offset 0
> LBA supported 31277232 sectors
> LBA48 supported 31277232 sectors
> PIO supported PIO4
> DMA supported WDMA2 UDMA6
> media RPM non-rotating
> Zoned-Device Commands no
>
> Feature Support Enabled Value Vendor
> read ahead yes yes
> write cache yes yes
> flush cache yes yes
> overlap no
> Tagged Command Queuing (TCQ) no no
> Native Command Queuing (NCQ) yes 32 tags
> NCQ Queue Management no
> NCQ Streaming no
> Receive & Send FPDMA Queued no
> SMART yes yes
> microcode download yes yes
> security yes no
> power management yes yes
> advanced power management yes no 0/0x00
> automatic acoustic management no no
> media status notification no no
> power-up in Standby no no
> write-read-verify no no
> unload yes yes
> general purpose logging yes yes
> free-fall no no
> Data Set Management (DSM/TRIM) yes
> DSM - max 512byte blocks yes 8
> DSM - deterministic read no
> Host Protected Area (HPA) yes no 31277232/31277232
> HPA - Security no
> 0#
>
>
>
> On 8/21/2018 2:30 PM, Mike Tancsa wrote:
>> On 8/21/2018 9:51 AM, Eugene Grosbein wrote:
>>>
>>> It seems like faulty media to me: it silently returns bad data.
>>>
>>> There is an easy way to verify this just with naked eye:
>>>
>>> yes | dd bs=128k of=/dev/ada0
>>> hd /dev/ada0
>>>
>>> That is, hd(1) should write back only 3 lines of output:
>>>
>>> 00000000 79 0a 79 0a 79 0a 79 0a 79 0a 79 0a 79 0a 79 0a
>>> |y.y.y.y.y.y.y.y.|
>>> *
>>> 01000000
>>>
>>> If not, the media if faulty.
>>>
>>
>> There are 3 of these disks I found. Unfortunately, they all seem a
>> little different from the revision stamps on the board. They are all
>> from PCEngines who generally seem to source quality products. This is in
>> an APU3
>>
>> A "bad" disk
>>
>> 0# camcontrol identify ada0
>> pass0: <SATA SSD S9FM02.0> ACS-3 ATA SATA 3.x device
>> pass0: 600.000MB/s transfers (SATA 3.x, PIO4, PIO 8192bytes)
>>
>> protocol ATA/ATAPI-10 SATA 3.x
>> device model SATA SSD
>> firmware revision S9FM02.0
>> serial number DED9075313EC01677930
>> cylinders 16383
>> heads 16
>> sectors/track 63
>> sector size logical 512, physical 512, offset 0
>> LBA supported 31277232 sectors
>> LBA48 supported 31277232 sectors
>> PIO supported PIO4
>> DMA supported WDMA2 UDMA6
>> media RPM non-rotating
>> Zoned-Device Commands no
>>
>> Feature Support Enabled Value Vendor
>> read ahead yes yes
>> write cache yes yes
>> flush cache yes yes
>> overlap no
>> Tagged Command Queuing (TCQ) no no
>> Native Command Queuing (NCQ) yes 32 tags
>> NCQ Queue Management no
>> NCQ Streaming no
>> Receive & Send FPDMA Queued no
>> SMART yes yes
>> microcode download yes yes
>> security yes no
>> power management yes yes
>> advanced power management yes no 0/0x00
>> automatic acoustic management no no
>> media status notification no no
>> power-up in Standby no no
>> write-read-verify no no
>> unload yes yes
>> general purpose logging yes yes
>> free-fall no no
>> Data Set Management (DSM/TRIM) yes
>> DSM - max 512byte blocks yes 8
>> DSM - deterministic read no
>> Host Protected Area (HPA) yes no 31277232/31277232
>> HPA - Security no
>> 0#
>>
>> vs
>> a 'good' disk
>>
>> # camcontrol identify ada0
>> pass0: <SATA SSD SBFM01.0> ACS-4 ATA SATA 3.x device
>> pass0: 600.000MB/s transfers (SATA 3.x, PIO4, PIO 8192bytes)
>>
>> protocol ATA/ATAPI-11 SATA 3.x
>> device model SATA SSD
>> firmware revision SBFM01.0
>> serial number A44907781CE300040613
>> WWN 5000000000000000
>> cylinders 16383
>> heads 16
>> sectors/track 63
>> sector size logical 512, physical 512, offset 0
>> LBA supported 31277232 sectors
>> LBA48 supported 31277232 sectors
>> PIO supported PIO4
>> DMA supported WDMA2 UDMA6
>> media RPM non-rotating
>> Zoned-Device Commands no
>>
>> Feature Support Enabled Value Vendor
>> read ahead yes yes
>> write cache yes yes
>> flush cache yes yes
>> overlap no
>> Tagged Command Queuing (TCQ) no no
>> Native Command Queuing (NCQ) yes 32 tags
>> NCQ Queue Management no
>> NCQ Streaming no
>> Receive & Send FPDMA Queued no
>> SMART yes yes
>> microcode download yes yes
>> security yes no
>> power management yes yes
>> advanced power management no no
>> automatic acoustic management no no
>> media status notification no no
>> power-up in Standby no no
>> write-read-verify no no
>> unload no no
>> general purpose logging yes yes
>> free-fall no no
>> Data Set Management (DSM/TRIM) yes
>> DSM - max 512byte blocks yes 8
>> DSM - deterministic read no
>> Host Protected Area (HPA) yes no 31277232/31277232
>> HPA - Security no
>>
>>
>>
>> % diff good bad
>> 1c1
>> < pass0: <SATA SSD SBFM01.0> ACS-4 ATA SATA 3.x device
>> ---
>>> pass0: <SATA SSD S9FM02.0> ACS-3 ATA SATA 3.x device
>> 4c4
>> < protocol ATA/ATAPI-11 SATA 3.x
>> ---
>>> protocol ATA/ATAPI-10 SATA 3.x
>> 6,8c6,7
>> < firmware revision SBFM01.0
>> < serial number A44907781CE300040613
>> < WWN 5000000000000000
>> ---
>>> firmware revision S9FM02.0
>>> serial number DED9075313EC01677930
>> 34c33
>> < advanced power management no no
>> ---
>>> advanced power management yes no 0/0x00
>> 39c38
>> < unload no no
>> ---
>>> unload yes yes
>> 46a46
>>>
>>
>> 1# yes | dd bs=128k of=/dev/ada0
>> dd: /dev/ada0: short write on character device
>> dd: /dev/ada0: end of device
>> 0+1066621 records in
>> 122176+1 records out
>> 16013942784 bytes transferred in 566.461990 secs (28270110 bytes/sec)
>> 1# hd /dev/ada0
>> 00000000 79 0a 79 0a 79 0a 79 0a 79 0a 79 0a 79 0a 79 0a
>> |y.y.y.y.y.y.y.y.|
>> *
>> 3ba816000
>> 0#
>>
>
>
--
-------------------
Mike Tancsa, tel +1 519 651 3400 x203
Sentex Communications, m...@sentex.net
Providing Internet services since 1994 www.sentex.net
Cambridge, Ontario Canada
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