On 17/04/07, Jesus Jr M Salvo <[EMAIL PROTECTED]> wrote: > Hi All, > > Just like to provide feedback about getting the Comsol UHD-3542 USB > 2.0 hard drive enclosure on 2.6 kernel. I am using FC6 with kernel > 2.6.20-1.2933.fc6, and after setting the up enclosure, here's what I > initially got: > > Apr 17 21:25:47 localhost kernel: usb 2-2: new high speed USB device > using ehci_hcd and address 4 > Apr 17 21:25:58 localhost kernel: usb 2-2: device not accepting > address 4, error -110 > Apr 17 21:25:59 localhost kernel: usb 2-2: new high speed USB device > using ehci_hcd and address 5 > Apr 17 21:26:10 localhost kernel: usb 2-2: device not accepting > address 5, error -110 > Apr 17 21:26:10 localhost kernel: usb 2-2: new high speed USB device > using ehci_hcd and address 6 > Apr 17 21:26:21 localhost kernel: usb 2-2: device not accepting > address 6, error -110 > Apr 17 21:26:21 localhost kernel: usb 2-2: new high speed USB device > using ehci_hcd and address 7 > Apr 17 21:26:31 localhost kernel: usb 2-2: device not accepting > address 7, error -110 > > > I tried plugging in to a different USB port, powering it on and off to no > avail. > What worked was unloading the ehci_hcd kernel module, like so: > > [EMAIL PROTECTED] jsalvo]# /sbin/rmmod ehci_hcd > > > ... and then all of a sudden, it sees the hard drive. What confuses me > though is that once ehci_hcd was unloaded, it then uses a different > kernel module ... ohci_hcd to actually access the hard drive in the > hard drive enclosure, as shown below: > > > Apr 17 21:55:45 localhost kernel: usb 1-2: new full speed USB device > using ohci_hcd and address 7 > Apr 17 21:55:47 localhost kernel: usb 1-2: configuration #1 chosen from 1 > choice > Apr 17 21:55:47 localhost kernel: scsi4 : SCSI emulation for USB Mass > Storage devices > Apr 17 21:55:52 localhost kernel: scsi 4:0:0:0: Direct-Access > WDC WD800JB-00ET 77.0 PQ: 0 ANSI: 0 CCS > Apr 17 21:55:52 localhost kernel: SCSI device sdb: 156301488 512-byte > hdwr sectors (80026 MB) > Apr 17 21:55:52 localhost kernel: sdb: test WP failed, assume Write Enabled > Apr 17 21:55:52 localhost kernel: sdb: assuming drive cache: write through > Apr 17 21:55:52 localhost kernel: SCSI device sdb: 156301488 512-byte > hdwr sectors (80026 MB) > Apr 17 21:55:52 localhost kernel: sdb: test WP failed, assume Write Enabled > Apr 17 21:55:52 localhost kernel: sdb: assuming drive cache: write through > Apr 17 21:55:52 localhost kernel: sdb: sdb1 sdb2 sdb3 sdb4 < sdb5 > sdb6 sdb7 sdb8 sdb9 sdb10 sdb11 > > Apr 17 21:55:52 localhost kernel: sd 4:0:0:0: Attached scsi disk sdb > Apr 17 21:55:52 localhost kernel: sd 4:0:0:0: Attached scsi generic sg1 type 0 > Apr 17 21:55:58 localhost kernel: kjournald starting. Commit interval 5 > seconds > Apr 17 21:55:58 localhost kernel: EXT3 FS on sdb7, internal journal > Apr 17 21:55:58 localhost kernel: EXT3-fs: mounted filesystem with > ordered data mode. > Apr 17 21:55:58 localhost hald: mounted /dev/sdb7 on behalf of uid 500 > > > Question is: > 1) Because I am using ochi_hcd and not ehci_hcd, does that mean I am > not really using USB 2.0 ?? > 2) Why did it try ehci_hcd in the first place and not ohci_hcd ? > > > Thanks, > > John >
Hi, Just adding another feedback, I tried kernel 2.6.20-1.2948.fc6 .... and it behaves the same as above. However, what I did not try earlier was to attach the USB enclosure to the USB port prior to startup / poweron of the laptop. If I plugin the USB enclosure to the USB port of my laptop, then I get full-speed!! as shown by /proc/bus/usb/devices, like this: T: Bus=02 Lev=01 Prnt=01 Port=01 Cnt=01 Dev#= 2 Spd=480 MxCh= 0 D: Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1 P: Vendor=048d ProdID=8903 Rev= 2.00 S: Manufacturer=ITE Tech. Inc. S: Product=USB2IDE Bridge Controllee S: SerialNumber=000000000065 C:* #Ifs= 1 Cfg#= 1 Atr=c0 MxPwr=100mA I: If#= 0 Alt= 0 #EPs= 2 Cls=08(stor.) Sub=06 Prot=50 Driver=usb-storage E: Ad=81(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms E: Ad=02(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms The speed says 480, and it does feel faster when doing a "find . -name '*' | xargs grep someword' on the directory mounted. If i then unplug it from the USB port ... and plug it again a few seconds later, then I get back to high-speed only: T: Bus=01 Lev=01 Prnt=01 Port=01 Cnt=01 Dev#= 4 Spd=12 MxCh= 0 D: Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1 P: Vendor=048d ProdID=8903 Rev= 2.00 S: Manufacturer=ITE Tech. Inc. S: Product=USB2IDE Bridge Controllee S: SerialNumber=000000000065 C:* #Ifs= 1 Cfg#= 1 Atr=c0 MxPwr=100mA I: If#= 0 Alt= 0 #EPs= 2 Cls=08(stor.) Sub=06 Prot=50 Driver=usb-storage E: Ad=81(I) Atr=02(Bulk) MxPS= 64 Ivl=0ms E: Ad=02(O) Atr=02(Bulk) MxPS= 64 Ivl=0ms ...and of course /var/log/messages will show that error about "not accepting address". So now the question is: *) Why does it work with full-speed if connected prior to startup, but works only with high-speed if connected after startup ?? John ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Linux-usb-users@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-users
