On Fri, 15 Jun 2007, Miernik wrote:

> I recently bought 2 different USB flash disks. These are some cheap no-name
> devices.  Their parameters:
> 
>    bytes            C/H/S       ID
> 4194304512       509/255/63     Vendor: Generic Model: USB Flash Drive  Rev: 
> 1.00  ANSI SCSI revision: 02
> 4288676352      1023/132/62     Vendor: USB     Model: USB 2.0          Rev: 
> 1.00  ANSI SCSI revision: 02
> 
> When I put a FAT32 filesystem on them, everything is OK, but when I put an 
> ext3
> filesystem, everything is OK when I write files to the disk, I can fill it 
> with
> files, but then when I remove the disk from the computer (after a proper
> umount) and putting it in again, most of the files have corrupted direcotry
> entries (they look red in midnight commander, some of them pink). But some
> (about 5 to 10%) files are normal, and normally accessible.
> 
> I tried them both on two completely different computers with very different
> hardware, and different Linux versions, and the effect is the same.
> 
> One of the computers is a desktop with and old AMD K7 Clayton motherboard with
> only old USB1.1: VT82xxxxx UHCI USB 1.1 Controller, and Debian sid with
> 2.6.18-4-k7 kernel from Debian.
> 
> The other computer is a much newer AMD Athlon64 HP laptop with USB2.0 port and
> SuSE 10.2.
> 
> Did anyone observe anything similar with any USB flash drives (FAT OK, ext3
> corrupted)?

What makes you think the FAT filesystems are okay?  Did you run dosfsck 
on them?

Alan Stern


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