On 8/23/05, Sebastian Pahlke <[EMAIL PROTECTED]> wrote: > Hi all, > > I'm trying to "clean" a disc before selling them: > > dd if=/dev/zero of=/dev/da0 > > Do I make something wrong because the transfer rate is only 60932 > bytes/sec??? These are 60 kbytes/sec, slower than my internet connection!!! > :( > > I tried to increase the block size, with bs=32768 I get 3416071 bytes/sec. > But this is still very poor. The system is a PIII 800MHz and a SCSI-3 disc > in single user mode booted from FreeBSD release 5.4 live-cd. > > Any ideas how to analyze this? Thanks in advance! >
Hmm, I'd start with increasing block size up to megabytes and if that doesn't help - I'd try to copy a large file to/from the disk and measure the speed. Also, the smartmontools port can tell you much if the drive supports SMART. Andrew P. _______________________________________________ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"