hi!
guys.
i was trying to achieve the speeds mentioned according to the usb 2.0 specs.
http://en.wikipedia.org/wiki/USB_2.0#USB_2.0
i'm not anywhere near it. has anyone else faced similar issues.
use case:
i've a 16 gig usb 2.0 pen drive and an amd athlon dual core system with usb
2.0 ports.
pasting my finding below
arun at opensolaris:/media# rmformat
Looking for devices...
1. Logical Node: /dev/rdsk/c11t0d0p0
Physical Node: /pci at 0,0/pci1043,81ef at 13,5/storage at 6/disk at 0,0
Connected Device: Kingston DT 101 II 1.00
Device Type: Removable
Bus: USB
Size: 15.3 GB
Label: repo0906
Access permissions: Medium is not write protected.
Sep 11 20:03:07 opensolaris usba: [ID 912658 kern.info] USB 2.0 device
(usb951,1625) operating at hi speed (USB 2.x) on USB 2.0 root hub: storage at 6,
scsa2usb1 at bus address 3
Sep 11 20:03:07 opensolaris usba: [ID 349649 kern.info] Kingston DT 101
II 001372982955F961061909AB
Sep 11 20:03:07 opensolaris genunix: [ID 936769 kern.info] scsa2usb1 is
/pci at 0,0/pci1043,81ef at 13,5/storage at 6
Sep 11 20:03:07 opensolaris genunix: [ID 408114 kern.info] /pci at 0
,0/pci1043,81ef at 13,5/storage at 6 (scsa2usb1) online
Sep 11 20:03:07 opensolaris scsi: [ID 583861 kern.info] sd2 at scsa2usb1:
target 0 lun 0
Sep 11 20:03:07 opensolaris genunix: [ID 936769 kern.info] sd2 is /pci at 0
,0/pci1043,81ef at 13,5/storage at 6/disk at 0,0
Sep 11 20:03:07 opensolaris scsi: [ID 107833 kern.warning] WARNING: /pci at 0
,0/pci1043,81ef at 13,5/storage at 6/disk at 0,0 (sd2):
Sep 11 20:03:07 opensolaris sd_get_write_cache_enabled: Mode Sense
returned invalid block descriptor length
Sep 11 20:03:07 opensolaris genunix: [ID 408114 kern.info] /pci at 0
,0/pci1043,81ef at 13,5/storage at 6/disk at 0,0 (sd2) online
Sep 11 20:03:07 opensolaris genunix: [ID 314293 kern.info] device
pciclass,030000 at 5(display#0) keeps up device sd at 0,0(disk#2), but the
latter
is not power managed
Sep 11 20:03:07 opensolaris pcplusmp: [ID 805372 kern.info] pcplusmp: ide
(ata) instance 3 irq 0xf vector 0x45 ioapic 0x2 intin 0xf is bound to cpu 1
arun at opensolaris:/etc/webmin# dd if=/dev/dsk/c11t0d0p0 of=/dev/null bs=32k
^C10042+0 records in
10041+0 records out
329023488 bytes (329 MB) copied, 18.0087 s, 18.3 MB/s
arun at opensolaris:~/Azureus Downloads/Fedora-11-i386-DVD# dd
if=Fedora-11-i386-DVD.iso of=/dev/rdsk/c11t0d0p0 bs=32k
112421+1 records in
112421+1 records out
3683829760 bytes (3.7 GB) copied, 865.186 s, 4.3 MB/s
--
Regards,
Arun Tomar
blog: http://linuxguy.in
website: http://www.solutionenterprises.co.in
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