On Thu, Sep 02, 2004 at 11:05:29AM -0700, Mark Knecht wrote: > Dave Phillips wrote: > >Mark Knecht wrote: > > > >>Mark Knecht wrote: > >><SNIP> > >> <snip> > > > >Best, > > > >dp > > > > 1394 hard drives work pretty well for me under both the 2.4 Planet > kernels and 2.6 Gentoo kernel. I have more trouble with CDRW/DVD drives > which do not work well under either in my experience. This is probably > not an issue for you. I do 1394 chips and software for a living so I try > a lot of this out on my company's nickle. > > 1394 performance under Linux is not what it should/could be. The Linux > 1394 stack doesn't optimize gap count automatically so throughput is > slow. (Maybe 5-11MB/S?) I think there may be some little stand alone > apps that will allow you to set the gap count by hand which would help. just skipped shortly through the archives and could'nt find anything on recommendations for external-harddisk Firewire/USB cases. Can anybody give me a hint? I'm looking out for a case, maybe both firewire and USB. Cheapest ones in the shop around the corner are 45 EUR. So buying that and the HD separately seems reasonable. But I guess they have a catch. Any recommendations or docu welcome. cheers, tobias. > > Humm...I just remembered that I had my main Pro Tools 1394 audio drive > in my laptop bag so I plugged it in and ran hdparm to get some results. > Better than I thought: > > root@flash ~ # hdparm -tT /dev/sda1 > > /dev/sda1: > Timing buffer-cache reads: 1640 MB in 2.00 seconds = 818.49 MB/sec > Timing buffered disk reads: 56 MB in 3.15 seconds = 17.75 MB/sec > > Speeds are higher under Windows, but this isn't bad at all. > > root@flash ~ # uname -a > Linux flash 2.6.8-gentoo-r2 #3 Fri Aug 27 11:05:03 PDT 2004 i686 Mobile > Intel(R) Pentium(R) 4 CPU 3.06GHz GenuineIntel GNU/Linux > root@flash ~ # > > I don't have a 2.4 series kernel here to test with. My laptop's chipset > doesn't work well under 2.4. Too new and many important things not > supported. > > I don't remember how to extract the actual IDE drive parameters out of > this 1394 drive case. I think the drive is a 7200RPM but it could be > 5400. I don't remember and I'm sure anything you bought today would be > faster. I've used this one for 18-24 months at least. The drive is set > up with larger than normal (32K) cluster sizes and is a FAT drive so > that I can use with both Pro Tools and other OS's as required. (Heck - I > just did!) ;-) > > From dmesg: > > <SNIP> > ieee1394: Host added: ID:BUS[0-00:1023] GUID[413f0200b723013d] > ip1394: $Rev: 1224 $ Ben Collins <bcollins@xxxxxxxxxx> > ip1394: eth1: IEEE-1394 IPv4 over 1394 Ethernet (fw-host0) > eth0: link up, 10Mbps, half-duplex, lpa 0x0000 > ieee1394: Node added: ID:BUS[0-01:1023] GUID[0001d20000030fc1] > ieee1394: The root node is not cycle master capable; selecting a new > root node and resetting... > ieee1394: Node changed: 0-01:1023 -> 0-00:1023 > ieee1394: Node changed: 0-00:1023 -> 0-01:1023 > sbp2: $Rev: 1219 $ Ben Collins <bcollins@xxxxxxxxxx> > scsi0 : SCSI emulation for IEEE-1394 SBP-2 Devices > ieee1394: sbp2: Logged into SBP-2 device > ieee1394: Node 0-00:1023: Max speed [S400] - Max payload [2048] > Vendor: WDC WD40 Model: 0BB-32CXA0 Rev: > Type: Direct-Access ANSI SCSI revision: 06 > Attached scsi generic sg0 at scsi0, channel 0, id 0, lun 0, type 0 > SCSI device sda: 78165360 512-byte hdwr sectors (40021 MB) > sda: asking for cache data failed > sda: assuming drive cache: write through > /dev/scsi/host0/bus0/target0/lun0: p1 > Attached scsi disk sda at scsi0, channel 0, id 0, lun 0 > root@flash ~ # > <SNIP> > > HTH, > Mark -- ThatThatThatThatThatCan'tYearstreamAllcommandSOFTWAREdirectoryREADMEvariouscodePlayerAudioBeautiful
