Date: Sun, 01 Jul 2007 21:54:04 -0600 (MDT) From: "M. Warner Losh" <imp@bsdimp.com> To: nate@root.org Cc: current@FreeBSD.org Subject: Re: GEOM weirdness with SD flash reader? Message-ID: <20070701.215404.1670806422.imp@bsdimp.com> In-Reply-To: <46880400.70808@root.org> References: <46880400.70808@root.org>
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In message: <46880400.70808@root.org>
Nate Lawson <nate@root.org> writes:
: Simply trying to mount a FAT filesystem in an external USB SD flash
: reader. The reader works fine, no errors in dmesg.
:
: deenlo# fdisk da2
: ******* Working on device /dev/da2 *******
: parameters extracted from in-core disklabel are:
: cylinders=982 heads=64 sectors/track=32 (2048 blks/cyl)
:
: parameters to be used for BIOS calculations are:
: cylinders=982 heads=64 sectors/track=32 (2048 blks/cyl)
:
: Media sector size is 512
: Warning: BIOS sector numbering starts with sector 1
: Information from DOS bootblock is:
: The data for partition 1 is:
: sysid 6 (0x06),(Primary 'big' DOS (>= 32MB))
: start 243, size 2011917 (982 Meg), flag 0
: beg: cyl 0/ head 3/ sector 55;
: end: cyl 998/ head 3/ sector 3
: The data for partition 2 is:
: <UNUSED>
: The data for partition 3 is:
: <UNUSED>
: The data for partition 4 is:
: <UNUSED>
: deenlo# mount -t msdosfs /dev/da2s1 /mnt/dos
: mount_msdosfs: /dev/da2s1: No such file or directory
: deenlo# mount -t msdosfs /dev/da2 /mnt/dos
: mount_msdosfs: /dev/da2: Invalid argument
: deenlo# mount -t msdosfs /dev/da2s1 /mnt/dos
: [success]
:
: So I'm guessing GEOM had to decide to create /dev/da2s1 after I tried to
: mount /dev/da2 directly? Nothing else would create the da2s1 device.
: Once the device was created with make_dev(), repeated unmounts/mounts
: work fine.
The reading of the device is taking a while, no? I've seen
significant lags between when the flash reader is inserted, and the
device is ready and the tasting process finishes. Reseating
everything often fixes the problem.
Warner
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