| 1 |
I bought a NexStar MX dual SATA enclosure and two 1TB drives for it. |
| 2 |
It has an internal switch to select it appearing as a single 2TB drive |
| 3 |
or two separate 1TB drives. I eventually want it to be the single |
| 4 |
drive, but I want it as two separate drives initially. However, it |
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doesn't work that way. |
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|
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I have tried these combinations: |
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|
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Both drives installed |
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|
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Swapped them |
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|
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One drive in each slot, the other slot empty |
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|
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Both slots work, and both drives work. But with two drives installed |
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and the switch in individual drives mode, it only shows one of them. |
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These are SATA and there is no master / slave jumper to snag me, |
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AFAIK. |
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|
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The instruction manual mkes a reference to the mode switch being |
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either JBOD or individual drives. They have a reference to RAID as a |
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comparison, but nowhere else in the manual do they refer to RAID, nor |
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does the box anywhere brag about RAID, and the installation procedures |
| 24 |
for both Windows and Mac explicitly show two separate new drives. I |
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think it is safe to assume I should see either one 2TB drive or two |
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1TB drives. |
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|
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I don't have either a Windows or a Mac to try this on, and I don't |
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particularly want to contaimnate my shiny new 1TB drives. |
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|
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So here's my question: |
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|
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Is there some feature of the USB spec that is not implemented under |
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Linux that would prevent one of the drives from showing up? |
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|
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The kernel config does NOT set CONFIG_SCSI_MULTI_LUN, if that makes |
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any difference. |
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|
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Here is /var/log/messages when I first inserted the USB connection: |
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|
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Dec 16 12:13:14 bitroteo [575806.793193] usb 4-3: new high speed USB device using ehci_hcd and address 6 |
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Dec 16 12:13:14 bitroteo [575806.909127] usb 4-3: configuration #1 chosen from 1 choice |
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Dec 16 12:13:14 bitroteo [575806.910493] scsi2 : SCSI emulation for USB Mass Storage devices |
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Dec 16 12:13:14 bitroteo [575806.910794] usb-storage: device found at 6 |
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Dec 16 12:13:14 bitroteo [575806.910799] usb-storage: waiting for device to settle before scanning |
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Dec 16 12:13:19 bitroteo [575811.909675] scsi 2:0:0:0: Direct-Access WDC WD10 EACS-00ZJB0 PQ: 0 ANSI: 2 CCS |
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Dec 16 12:13:19 bitroteo [575811.911024] sd 2:0:0:0: [sda] 1953525168 512-byte hardware sectors (1000205 MB) |
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Dec 16 12:13:19 bitroteo [575811.911754] sd 2:0:0:0: [sda] Write Protect is off |
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Dec 16 12:13:19 bitroteo [575811.911761] sd 2:0:0:0: [sda] Mode Sense: 00 38 00 00 |
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Dec 16 12:13:19 bitroteo [575811.911765] sd 2:0:0:0: [sda] Assuming drive cache: write through |
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Dec 16 12:13:19 bitroteo [575811.912751] sd 2:0:0:0: [sda] 1953525168 512-byte hardware sectors (1000205 MB) |
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Dec 16 12:13:19 bitroteo [575811.913500] sd 2:0:0:0: [sda] Write Protect is off |
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Dec 16 12:13:19 bitroteo [575811.913506] sd 2:0:0:0: [sda] Mode Sense: 00 38 00 00 |
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Dec 16 12:13:19 bitroteo [575811.913509] sd 2:0:0:0: [sda] Assuming drive cache: write through |
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Dec 16 12:13:19 bitroteo [575811.913519] sda: unknown partition table d |
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Dec 16 12:13:19 bitroteo [575811.923424] sd 2:0:0:0: [sda] Attached SCSI disk |
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Dec 16 12:13:19 bitroteo [575811.923691] sd 2:0:0:0: Attached scsi generic sg0 type 0 |
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Dec 16 12:13:19 bitroteo [575811.924342] usb-storage: device scan complete |
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|
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Here is the result of lsusb: |
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|
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# lsusb |
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Bus 004 Device 013: ID 152d:2336 JMicron Technology Corp. / JMicron |
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USA Technology Corp. |
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Bus 004 Device 001: ID 0000:0000 |
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Bus 002 Device 001: ID 0000:0000 |
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Bus 003 Device 002: ID 047d:1020 Kensington |
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Bus 003 Device 001: ID 0000:0000 |
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Bus 001 Device 003: ID 06a3:8000 Saitek PLC |
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Bus 001 Device 001: ID 0000:0000 |
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|
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# lsusb -v -s 4:13 |
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|
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Bus 004 Device 013: ID 152d:2336 JMicron Technology Corp. / JMicron |
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USA Technology Corp. |
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Device Descriptor: |
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bLength 18 |
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bDescriptorType 1 |
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bcdUSB 2.00 |
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bDeviceClass 0 (Defined at Interface level) |
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bDeviceSubClass 0 |
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bDeviceProtocol 0 |
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bMaxPacketSize0 64 |
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idVendor 0x152d JMicron Technology Corp. / JMicron USA |
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Technology Corp. |
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idProduct 0x2336 |
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bcdDevice 1.00 |
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iManufacturer 1 JMicron |
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iProduct 2 JM20336 SATA, USB Combo |
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iSerial 5 8DC88D10EAC8 |
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bNumConfigurations 1 |
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Configuration Descriptor: |
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bLength 9 |
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bDescriptorType 2 |
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wTotalLength 32 |
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bNumInterfaces 1 |
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bConfigurationValue 1 |
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iConfiguration 4 USB Mass Storage |
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bmAttributes 0xc0 |
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Self Powered |
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MaxPower 2mA |
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Interface Descriptor: |
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bLength 9 |
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bDescriptorType 4 |
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bInterfaceNumber 0 |
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bAlternateSetting 0 |
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bNumEndpoints 2 |
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bInterfaceClass 8 Mass Storage |
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bInterfaceSubClass 6 SCSI |
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bInterfaceProtocol 80 Bulk (Zip) |
| 111 |
iInterface 6 Bulk-In, Bulk-Out Interface |
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Endpoint Descriptor: |
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bLength 7 |
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bDescriptorType 5 |
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bEndpointAddress 0x81 EP 1 IN |
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bmAttributes 2 |
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Transfer Type Bulk |
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Synch Type None |
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Usage Type Data |
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wMaxPacketSize 0x0200 1x 512 bytes |
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bInterval 0 |
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Endpoint Descriptor: |
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bLength 7 |
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bDescriptorType 5 |
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bEndpointAddress 0x02 EP 2 OUT |
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bmAttributes 2 |
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Transfer Type Bulk |
| 128 |
Synch Type None |
| 129 |
Usage Type Data |
| 130 |
wMaxPacketSize 0x0200 1x 512 bytes |
| 131 |
bInterval 0 |
| 132 |
Device Qualifier (for other device speed): |
| 133 |
bLength 10 |
| 134 |
bDescriptorType 6 |
| 135 |
bcdUSB 2.00 |
| 136 |
bDeviceClass 0 (Defined at Interface level) |
| 137 |
bDeviceSubClass 0 |
| 138 |
bDeviceProtocol 0 |
| 139 |
bMaxPacketSize0 64 |
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bNumConfigurations 1 |
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can't get debug descriptor: Connection timed out |
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Device Status: 0x0001 |
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Self Powered |
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|
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-- |
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... _._. ._ ._. . _._. ._. ___ .__ ._. . .__. ._ .. ._. |
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Felix Finch: scarecrow repairman & rocket surgeon / felix@×××××××.com |
| 148 |
GPG = E987 4493 C860 246C 3B1E 6477 7838 76E9 182E 8151 ITAR license #4933 |
| 149 |
I've found a solution to Fermat's Last Theorem but I see I've run out of room o |
| 150 |
-- |
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