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Random write errors -SDIO SD card error on line 413, error code 2 #34

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z80micro-mc opened this issue May 4, 2023 · 11 comments
Open

Random write errors -SDIO SD card error on line 413, error code 2 #34

z80micro-mc opened this issue May 4, 2023 · 11 comments

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@z80micro-mc
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I am getting occasional write errors when I copy a number of files.

log.txt

[10ms] Platform: BlueSCSI Pico
[10ms] FW Version: 2023.04.10-dev Apr 30 2023 15:09:12
Flash chip size: 2048 kB

=== SD Card Info ===
SD card detected, FAT32 volume size: 7615 MB
SD Name: ASTC, MID: 0xFE, OID: 0x34 0x56

=== Global Config ===
Reading configuration from bluescsi.ini
Active configuration (using system preset "Generic"):
-- SelectionDelay: 150
-- EnableSCSI2 is off
-- Parity is disabled

=== Finding images in / ===
== Opening /HD10_512.hda for ID: 1 LUN: 0
---- Image ready
== Opening /HD20_512.hda for ID: 2 LUN: 0
---- Image ready

=== ROM Drive ===
Platform supports ROM drive up to 1692 kB
---- ROM drive SCSI id 1 is already in use, not enabling

=== Configured SCSI Devices ===

  • ID: 1, BlockSize: 512, Type: Fixed, Quirks: None, Size: 31980kB
  • ID: 2, BlockSize: 512, Type: Fixed, Quirks: None, Size: 63960kB

Initialization complete!
SDIO SD card error on line 413, error code 2
SDIO SD card error on line 413, error code 2
SDIO SD card error on line 413, error code 2
SDIO SD card error on line 413, error code 2
SDIO SD card error on line 413, error code 2
SdioCard::stopTransmission() timeout
SD card write failed: 0x00
SDIO SD card error on line 413, error code 2
SDIO SD card error on line 413, error code 2
SdioCard::stopTransmission() timeout
SD card write failed: 0x00
SDIO SD card error on line 413, error code 2

Thoughts / ideas please

Peter
@Konf
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Konf commented May 4, 2023

Hi! I had such errors with old and slow SD card. Replaced it with new a one and no such errors appear anymore.

@z80micro-mc
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Konf,

Thanks for your input.

I am currently using an 8 GB, C10, U1 Kingston micro SD rated at 80 MB/s. I obtain ~ 180 KB/s read or write via DOS. The SD is nearly 200 times faster than the transfer speed. On a large number of writes (copy all the files on a disk to another disk) I intermittently get write errors ~ every once every 5-10 minutes, at the current transfer rates I estimate ~ 1 failure in ~ 50,000 write sector operations.

To my reasoning is that is rather indicative of a timing race condition. A faster SD may reduce the likelyhood of errors but I think that there is a fundamental timing race condition. I would be tempted to slow the SD right down to make the condition worse to investigate further.

To date I have only ever seen, errors on write and repeating the same write subsequently succeeds. I have never, seen a failure on read. The write failure gets mapped to a general failure reported by DOS, if one selects the 'r' repeat operation it proceeds without error until the next random event.

Peter

@z80micro-mc
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Eric,

If it would be helpful, I could put a logic analyser on the SCSI bus. However, as the event is so infrequent, it would be helpful if there is a spare gpio bit which you could toggle on error. I could then trigger the analyser on the bit change.

The analyser is capturing all the time and can be set to stop on trigger event, well 25% buffer before or after the event selectable.

Peter

@erichelgeson
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No free pins but you can re-purpose SDBG, S1, or S2 since they are normally unused. Interested in any results you get.

@z80micro-mc
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z80micro-mc commented May 6, 2023 via email

@erichelgeson
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erichelgeson commented May 6, 2023 •
edited

I had to use the SDBG (pin 16) - it will go high on an SD error. If you'd like a pulse (how long) or delay or something let me know.
https://github.com/BlueSCSI/BlueSCSI-v2/actions/runs/4902832099 <-- binaries at the bottom (includes troy's patch, and the typo fixed for ParityEnable)
227baab <-- change

@z80micro-mc
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z80micro-mc commented May 6, 2023 via email

@erichelgeson
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This build will clear the assertion on next success read or write - https://github.com/BlueSCSI/BlueSCSI-v2/actions/runs/4902950485

@z80micro-mc
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z80micro-mc commented May 6, 2023 via email

@erichelgeson
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Please test with the latest release and report back, there were various fixes related to SD cards.

@erichelgeson
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Hi, any update or anything for us to follow up on? We've seen this a few times and usually a full overwrite format with SD formatter as mentioned takes care of it, or cleaning the contacts on the SD card (can get dirty!), or trying another SD card.

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3 participants
@erichelgeson @Konf @z80micro-mc