Here is some more information
This is uboot output:
U-Boot 2011.06-02334-g8f495d9-dirty (May 31 2011 - 02:06:26)
Marvell-DreamPlug
SoC: Kirkwood 88F6281_A0
CPU running @ 1200Mhz L2 running @ 400Mhz
SysClock = 400Mhz , TClock = 200Mhz
DRAM: 512 MiB
SF: Detected MX25L1606 with page size 256, total 1 MiB
In: serial
Out: serial
Err: serial
Net: egiga0, egiga1
88E1116 Initialized on egiga0
88E1116 Initialized on egiga1
Hit any key to stop autoboot: 0
Marvell>> usb start
(Re)start USB...
USB: Register 10011 NbrPorts 1
USB EHCI 1.00
scanning bus for devices... 5 USB Device(s) found
scanning bus for storage devices... 3 Storage Device(s) found
Marvell>> usb storage
Device 0: Vendor: Generic Rev: 9910 Prod: STORAGE DEVICE
Type: Removable Hard Disk
Capacity: 3920.0 MB = 3.8 GB (8028160 x 512)
Device 1: Vendor: Generic Rev: 9910 Prod: STORAGE DEVICE
Type: Removable Hard Disk
Capacity: 15312.0 MB = 14.9 GB (31358976 x 512)
Device 2: Vendor: SAMSUNG Rev: 1AQ1 Prod: HD204UI
Type: Hard Disk
Capacity: 1907729.0 MB = 1863.0 GB (-387938128 x 512)
Marvell>> usb reset
(Re)start USB...
USB: Register 10011 NbrPorts 1
USB EHCI 1.00
scanning bus for devices... 5 USB Device(s) found
scanning bus for storage devices... 2 Storage Device(s) found
Marvell>> usb storage
Device 0: Vendor: Generic Rev: 9910 Prod: STORAGE DEVICE
Type: Removable Hard Disk
Capacity: 3920.0 MB = 3.8 GB (8028160 x 512)
Device 1: Vendor: Generic Rev: 9910 Prod: STORAGE DEVICE
Type: Removable Hard Disk
Capacity: 15312.0 MB = 14.9 GB (31358976 x 512)
when booting linux :
(initramfs) modprobe ehci_hcd
ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
orion-ehci orion-ehci.0: Marvell Orion EHCI
orion-ehci orion-ehci.0: new USB bus registered, assigned bus number 1
orion-ehci orion-ehci.0: irq 19, io mem 0xf1050000
orion-ehci orion-ehci.0: USB 2.0 started, EHCI 1.00
hub 1-0:1.0: USB hub found
hub 1-0:1.0: 1 port detected
usb 1-1: new high-speed USB device number 2 using orion-ehci
hub 1-1:1.0: USB hub found
hub 1-1:1.0: 4 ports detected
usb 1-1.1: new high-speed USB device number 3 using orion-ehci
Initializing USB Mass Storage driver...
scsi7 : usb-storage 1-1.1:1.0
usbcore: registered new interface driver usb-storage
USB Mass Storage support registered.
usb 1-1.3: new high-speed USB device number 4 using orion-ehci
usb 1-1.3: device descriptor read/64, error -71
usb 1-1.3: device descriptor read/64, error -71
usb 1-1.3: new high-speed USB device number 5 using orion-ehci
usb 1-1.3: device descriptor read/64, error -71
usb 1-1.3: device descriptor read/64, error -71
scsi 7:0:0:0: Direct-Access Generic STORAGE DEVICE 9910 PQ: 0 ANSI: 0
usb 1-1.3: new high-speed USB device number 6 using orion-ehci
sd 7:0:0:0: Attached scsi generic sg0 type 0
sd 7:0:0:0: [sda] 8028160 512-byte logical blocks: (4.11 GB/3.82 GiB)
scsi 7:0:0:1: Direct-Access Generic STORAGE DEVICE 9910 PQ: 0 ANSI: 0
sd 7:0:0:0: [sda] Write Protect is off
sd 7:0:0:0: [sda] Mode Sense: 0b 00 00 08
sd 7:0:0:0: [sda] No Caching mode page present
sd 7:0:0:1: Attached scsi generic sg1 type 0
sd 7:0:0:1: [sdb] 31358976 512-byte logical blocks: (16.0 GB/14.9 GiB)
sd 7:0:0:0: [sda] Assuming drive cache: write through
sd 7:0:0:1: [sdb] Write Protect is off
sd 7:0:0:1: [sdb] Mode Sense: 0b 00 00 08
sd 7:0:0:1: [sdb] No Caching mode page present
sd 7:0:0:0: [sda] No Caching mode page present
sd 7:0:0:0: [sda] Assuming drive cache: write through
sd 7:0:0:1: [sdb] Assuming drive cache: write through
sda: sda1 sda2
sd 7:0:0:1: [sdb] No Caching mode page present
sd 7:0:0:1: [sdb] Assuming drive cache: write through
sd 7:0:0:0: [sda] No Caching mode page present
sd 7:0:0:0: [sda] Assuming drive cache: write through
sd 7:0:0:0: [sda] Attached SCSI removable disk
sdb: sdb1 sdb2
sd 7:0:0:1: [sdb] No Caching mode page present
sd 7:0:0:1: [sdb] Assuming drive cache: write through
sd 7:0:0:1: [sdb] Attached SCSI removable disk
usb 1-1.3: device not accepting address 6, error -71
usb 1-1.3: new high-speed USB device number 7 using orion-ehci
usb 1-1.3: device not accepting address 7, error -71
hub 1-1:1.0: unable to enumerate USB device on port 3
usb 1-1.4: new full-speed USB device number 8 using orion-ehci
input: C-Media USB Headphone Set as /devices/platform/orion-ehci.0/usb1/1-1/1-1.4/1-1.4:1.3/input/input6
hid-generic 0003:0D8C:000C.0007: input: USB HID v1.00 Device [C-Media USB Headphone Set ] on usb-orion-ehci.0-1.4/input3
when booting linux with replug of the usb disk after boot:
(initramfs) modprobe ehci_hcd
ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
orion-ehci orion-ehci.0: Marvell Orion EHCI
orion-ehci orion-ehci.0: new USB bus registered, assigned bus number 1
orion-ehci orion-ehci.0: irq 19, io mem 0xf1050000
orion-ehci orion-ehci.0: USB 2.0 started, EHCI 1.00
hub 1-0:1.0: USB hub found
hub 1-0:1.0: 1 port detected
usb 1-1: new high-speed USB device number 2 using orion-ehci
hub 1-1:1.0: USB hub found
hub 1-1:1.0: 4 ports detected
usb 1-1.1: new high-speed USB device number 3 using orion-ehci
usb 1-1.1: new high-speed USB device number 3 using orion-ehci
Initializing USB Mass Storage driver...
scsi8 : usb-storage 1-1.1:1.0
usbcore: registered new interface driver usb-storage
USB Mass Storage support registered.
usb 1-1.3: new high-speed USB device number 4 using orion-ehci
scsi9 : usb-storage 1-1.3:1.0
usb 1-1.4: new full-speed USB device number 5 using orion-ehci
input: C-Media USB Headphone Set as /devices/platform/orion-ehci.0/usb1/1-1/1-1.4/1-1.4:1.3/input/input7
hid-generic 0003:0D8C:000C.0008: input: USB HID v1.00 Device [C-Media USB Headphone Set ] on usb-orion-ehci.0-1.4/input3
scsi 8:0:0:0: Direct-Access Generic STORAGE DEVICE 9910 PQ: 0 ANSI: 0
sd 8:0:0:0: Attached scsi generic sg0 type 0
scsi 8:0:0:1: Direct-Access Generic STORAGE DEVICE 9910 PQ: 0 ANSI: 0
sd 8:0:0:0: [sda] 8028160 512-byte logical blocks: (4.11 GB/3.82 GiB)
sd 8:0:0:0: [sda] Write Protect is off
sd 8:0:0:0: [sda] Mode Sense: 0b 00 00 08
sd 8:0:0:1: Attached scsi generic sg1 type 0
sd 8:0:0:1: [sdb] 31358976 512-byte logical blocks: (16.0 GB/14.9 GiB)
sd 8:0:0:0: [sda] No Caching mode page present
sd 8:0:0:1: [sdb] Write Protect is off
sd 8:0:0:1: [sdb] Mode Sense: 0b 00 00 08
sd 8:0:0:0: [sda] Assuming drive cache: write through
sd 8:0:0:1: [sdb] No Caching mode page present
sd 8:0:0:1: [sdb] Assuming drive cache: write through
sd 8:0:0:0: [sda] No Caching mode page present
sd 8:0:0:0: [sda] Assuming drive cache: write through
sda: sda1 sda2
sd 8:0:0:1: [sdb] No Caching mode page present
sd 8:0:0:1: [sdb] Assuming drive cache: write through
sd 8:0:0:0: [sda] No Caching mode page present
sd 8:0:0:0: [sda] Assuming drive cache: write through
sdb: sdb1 sdb2
sd 8:0:0:0: [sda] Attached SCSI removable disk
sd 8:0:0:1: [sdb] No Caching mode page present
sd 8:0:0:1: [sdb] Assuming drive cache: write through
sd 8:0:0:1: [sdb] Attached SCSI removable disk
scsi 9:0:0:0: Direct-Access SAMSUNG HD204UI 1AQ1 PQ: 0 ANSI: 0
sd 9:0:0:0: Attached scsi generic sg2 type 0
sd 9:0:0:0: [sdc] 3907029168 512-byte logical blocks: (2.00 TB/1.81 TiB)
sd 9:0:0:0: [sdc] Write Protect is off
sd 9:0:0:0: [sdc] Mode Sense: 03 00 00 00
sd 9:0:0:0: [sdc] No Caching mode page present
sd 9:0:0:0: [sdc] Assuming drive cache: write through
sd 9:0:0:0: [sdc] No Caching mode page present
sd 9:0:0:0: [sdc] Assuming drive cache: write through
sdc: sdc1
sd 9:0:0:0: [sdc] No Caching mode page present
sd 9:0:0:0: [sdc] Assuming drive cache: write through
sd 9:0:0:0: [sdc] Attached SCSI disk