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Author Topic: /var on SDCard, frequently fails and ends up being mounted readonly.  (Read 1518 times)
mgillespie
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« on: April 06, 2010, 12:00:44 AM »

A couple of months back, after several posters here planted seeds of doubt in my head about internal nand wear, I picked up a transcend 4GB Class6 SDCard, and moved my /var partition to it. (as looking at iotop, that's where most of my writes were occuring, by doing just var, I don't take too much of a write performance hit that sdcard brings compared to internal nand).

Anyway, several times now, it's all gone pear shaped, and several services break down.  Upon investigation, my sdcard is mounted read-only.

Today I managed to get in via ssh after this had happened, and got a dump of dmesg (snippet included)

Any ideas what's going on?  (latest cxbiker kernel)

Quote
mmcblk0: error -110 transferring data, sector 437848, nr 8, card status 0xc00
end_request: I/O error, dev mmcblk0, sector 437848
Buffer I/O error on device mmcblk0p1, logical block 53707
lost page write due to I/O error on mmcblk0p1
mmcblk0: error -110 sending read/write command, response 0xd00, card status 0x400d00
mvsdio mvsdio: FIFO_EMPTY bit missing
end_request: I/O error, dev mmcblk0, sector 3700800
end_request: I/O error, dev mmcblk0, sector 3700808
Aborting journal on device mmcblk0p1-8.
mvsdio mvsdio: FIFO_EMPTY bit missing
mmcblk0: error -110 sending read/write command, response 0x400d00, card status 0x400d00
mvsdio mvsdio: FIFO_EMPTY bit missing
end_request: I/O error, dev mmcblk0, sector 3678208
Buffer I/O error on device mmcblk0p1, logical block 458752
lost page write due to I/O error on mmcblk0p1
JBD2: I/O error detected when updating journal superblock for mmcblk0p1-8.
EXT4-fs error (device mmcblk0p1): ext4_journal_start_sb: Detected aborted journal
EXT4-fs (mmcblk0p1): Remounting filesystem read-only
EXT4-fs error (device mmcblk0p1): ext4_journal_start_sb: Detected aborted journal
EXT4-fs (mmcblk0p1): Remounting filesystem read-only

mvsdio mvsdio: FIFO_EMPTY bit missing
mmcblk0: retrying using single block read
mvsdio mvsdio: FIFO_EMPTY bit missing
mmcblk0: error -110 sending read/write command, response 0xd00, card status 0x400d00
end_request: I/O error, dev mmcblk0, sector 75664

« Last Edit: April 06, 2010, 12:10:57 AM by mgillespie » Logged

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