It seems Brian Feldman wrote: > I tried this out just as soon as I saw the announcement! Your driver is > really coming along well. I have three basic problems with it: > > 1. A hard reset is necessary to get the CD-ROM drive to work with acd. > > wdc0: unit 1 (atapi): <NEC CD-ROM DRIVE:285/3.04>, removable, > dma, iordy > wcd0: drive speed 2067KB/sec, 128KB cache > wcd0: supported read types: CD-R, CD-DA > wcd0: Audio: play, 16 volume levels > wcd0: Mechanism: ejectable tray > wcd0: Medium: no/blank disc inside, unlocked
Ugh, one of those NEC's again, it seems there are many problems with their CDROM's, I'll try to get ahold of some... > > 2. My LS-120 still has no reliability with the driver, as reads are > corrupted extremely often. > > wdc1: unit 0 (atapi): <LS-120 COSM 02 UHD Floppy/0271C09T>, > removable, iordy > wfd0: medium type unknown (no disk) Hmm, my ZIP works just fine, I'll see what I can come up with.. > 3. DMA is ineffective with file-system use. I can read from the raw > device rad0 at 4.5MB/s with a 1mb block size, but when I use iozone > performance > is around 2.5MB/s. Mounting wd shouldn't affect that, should it? I used the > same device special files to mount as before, with ATA_STATIC being used, > and noticed this. Better yet, I'll try this with a corrected fstab then > report back. This is more likely due to the last changes Julian/Matt has committed to vfs_bio.c et all, it hoses our I/O performance pretty badly. There is work underways to fix it though. -Søren To Unsubscribe: send mail to majord...@freebsd.org with "unsubscribe freebsd-current" in the body of the message
