On Fri, Jan 16, 2009 at 08:56:49PM +0000, Hasso Tepper (via DragonFly issue tracker) wrote: > da0: <pqi IntelligentStick 0.00> Removable Direct Access SCSI-2 device > da0: 40.000MB/s transfers > da0: 963MB (1974271 512 byte sectors: 64H 32S/T 963C) > > $ sudo dd if=/dev/zero of=/mnt/file bs=512k count=100 > 100+0 records in > 100+0 records out > 52428800 bytes transferred in 1.744845 secs (30047824 bytes/sec) > $ time sudo umount /mnt > real 4m7.152s <- ?!?!?! > user 0m0.008s > sys 0m0.047s > $ > > It doesn't happen with any other OS (tried Debian, MacOSX and Windows XP) > and there is no problem in DragonFly with the very same formatted to UFS > either.
Does the behaviour change if you use standard 512-byte blocks? People seem to think that USB pen/flash drives behave exactly like hard disks when it comes to their methodology of storage and block handling -- they don't. -- | Jeremy Chadwick jdc at parodius.com | | Parodius Networking http://www.parodius.com/ | | UNIX Systems Administrator Mountain View, CA, USA | | Making life hard for others since 1977. PGP: 4BD6C0CB |
