Misdetected volume size for Samsung YP-U1?
Weinehall David (Nokia-M/Tampere)
David.Weinehall at nokia.com
Thu Mar 23 01:28:23 PST 2006
On ons, 2006-03-22 at 16:42 -0500, ext David Zeuthen wrote:
> On Wed, 2006-03-22 at 18:36 +0200, Weinehall David (Nokia-M/Tampere)
> > My Samsung YP-U1 (1GB flashbased OGG-player) gets reported
> > as a "3.9GB Removable Volume" on the desktop by Nautilus.
> Yea, your device reports the wrong block size:
> > volume.size = 1047814144 (0x3e746000) (uint64)
> > volume.num_blocks = 2046512 (0x1f3a30) (int)
> > volume.block_size = 2048 (0x800) (int)
> and the function libhal_volume_get_size() in libhal-storage uses
> volume.num_blocks * volume.block_size instead of volume.size (because we
> added the latter later).
> Normally (always?), blocks are 512 bytes for USB storage devices but for
> other storage thingies (notably optical discs) it can be slightly
> larger; we use the BLKSSZGET ioctl to determine it.. Can you confirm
> this with a short program that does this
> int fd;
> int block_size;
> fd = open ("/dev/sda1", O_RDONLY);
> ioctl (fd, BLKSSZGET, &block_size);
> printf ("block_size = %d", block_size);
> and prints out the block_size? So, if this is the case it looks like the
> usb-storage driver is buggy and you need a fix for your device in
> unusual_devs.h or whatever it's called nowadays. Please report this to
> the usb-storage maintainer if it's the case.
That program reports 2048.
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