Re: kern/49140 (Can't write to SD card)

[Patrick Welche <prlw1%cam.ac.uk@localhost>]

On Wed, Oct 01, 2014 at 10:37:33PM +0000, jmcneill%NetBSD.org@localhost wrote:
> http://mail-index.netbsd.org/source-changes/2014/10/01/msg059065.html

Overall, I'm afraid not:

# dd if=/dev/zero of=/dev/rld0d bs=64k count=100
dd: /dev/rld0d: Input/output error
1+0 records in
0+0 records out
0 bytes transferred in 0.001 secs (0 bytes/sec)

ld0 at sdmmc0: <0x27:0x5048:SD16G:0x30:0x7c78db06:0x0c7>
ld0: 14756 MB, 7495 cyl, 64 head, 63 sec, 512 bytes/sect x 30220288 sectors
ld0: 4-bit width, bus clock 50.000 MHz
ld0d: error writing fsbn 0 of 0-127 (ld0 bn 0; cn 0 tn 0 sn 0)
ld0d: error reading fsbn 0 (ld0 bn 0; cn 0 tn 0 sn 0)
ld0: dos partition I/O error
ld0d: error writing fsbn 0 of 0-127 (ld0 bn 0; cn 0 tn 0 sn 0)

The above was from a cold boot with your timing fixes.

In another session, I managed to write 1.6G to the card once (also with
the new kernel), so not all is bad, but I was very lucky that one time.