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IvanZD
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PostPosted: Thu Aug 25, 2011 3:52 pm    Post subject: Large capacity hard drive not recognized properly Reply with quote

Hello.

I got WD Caviar 2.5TB and put it into Sharkoon USB desktop dock enclosure. It is not recognized properly:

Code:
usb 2-3: USB disconnect, address 15
usb 2-3.1: USB disconnect, address 17
usb 2-3.4: USB disconnect, address 16
usb 2-3: new high speed USB device using ehci_hcd and address 18
hub 2-3:1.0: USB hub found
hub 2-3:1.0: 4 ports detected
usb 2-3.4: new high speed USB device using ehci_hcd and address 19
usb-storage 2-3.4:1.0: Quirks match for vid 05e3 pid 0723: 8000
scsi22 : usb-storage 2-3.4:1.0
scsi 22:0:0:0: Direct-Access     Generic  STORAGE DEVICE   9451 PQ: 0 ANSI: 0
sd 22:0:0:0: Attached scsi generic sg4 type 0
sd 22:0:0:0: [sdd] Attached SCSI removable disk
usb 2-3.1: new high speed USB device using ehci_hcd and address 20
scsi23 : usb-storage 2-3.1:1.0
scsi 23:0:0:0: Direct-Access     Generic  External         2.10 PQ: 0 ANSI: 4
sd 23:0:0:0: Attached scsi generic sg5 type 0
sd 23:0:0:0: [sde] 588813872 512-byte logical blocks: (301 GB/280 GiB)
sd 23:0:0:0: [sde] Write Protect is off
sd 23:0:0:0: [sde] Mode Sense: 21 00 00 00
sd 23:0:0:0: [sde] Assuming drive cache: write through
sd 23:0:0:0: [sde] Assuming drive cache: write through
 sde: unknown partition table
sd 23:0:0:0: [sde] Assuming drive cache: write through
sd 23:0:0:0: [sde] Attached SCSI disk


So it is recognized as only 301GB drive. Gparted reports same size. Kernel is 2.6.36-gentoo-r5. Is it because of 2.2TB limit, USB enclosure limitations, motherboard, operating system, kernel...? I tried to find help on google but without success.

What now? Thanks.
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Randy Andy
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PostPosted: Thu Aug 25, 2011 4:20 pm    Post subject: Reply with quote

Hi IvanZD.

To use such big hard disks, you have to do this:

Make sure that your kernel has this support enabled and running.
CONFIG_EFI_PARTITION=y

If you may use the a capacity more than 2TB in one partion, you have to partition the disk with a GPT table.
You could use gdisk for that (from package sys-apps/gptfdisk).

Or, if you prefer a gui sys-block/gparted-0.8.0.
Beware that you have to create at first a Partition Table GPT using the drop down menue entry then.

The rest should work flawlessly then.

Andy.
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IvanZD
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PostPosted: Thu Aug 25, 2011 4:55 pm    Post subject: Reply with quote

Randy Andy wrote:
To use such big hard disks, you have to do this:

Make sure that your kernel has this support enabled and running.
CONFIG_EFI_PARTITION=y


Thanks Randy,

I did this and rebooted into new kernel but still have the same issue (reported disk size stay only 301GB). Any other idea what to check?

Thanks
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IvanZD
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PostPosted: Thu Aug 25, 2011 5:13 pm    Post subject: Reply with quote

OK it seems it is USB enclosure limitation:

http://www.sharkoon.com/?q=en/node/1261

it supports disks only up to 2TB. It seems I should get a newer one :evil:
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Randy Andy
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PostPosted: Thu Aug 25, 2011 5:16 pm    Post subject: Reply with quote

Ivan,

try at next to partition the drive with a gpt scheme,
as i mentioned.

If you can, cause the drive is not filled up with data.

Then we'll see.

Update after your overlapping post.

Ok, than it makes no sense.
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nlsa8z6zoz7lyih3ap
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PostPosted: Thu Aug 25, 2011 7:00 pm    Post subject: Reply with quote

I also faced this problem with a 3TB usb drive. (Western Digital My Book.)
I solved this problem by
(1) replacing the kernel with one having " CONFIG_EFI_PARTITION" enabled.
(2) emerging gptfdisk
(3) repartitioning the MyBook using the command gdisk (instead of fdisk.) (It came preformated, but that did not seem to work on linux for me.)

This , of course, is much the same as advice already given in this topic, but I am independantly confirming that it worked (at least for me.)
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