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Old 09-25-2012, 06:04 AM
George R Goffe
 
Default New 3tb hdd thinks it's 801.6 GB

Hi,
I'm more than a little confused. I got a new 3tb seagate hdd and typo'd by placing a filesystem on /dev/sdc instead of /dev/sdc1. Now the drive thinks it's a 801.6 GB. At least this is what fdisk -l reports.
Some questions:
1) how do I "fix" this?2) do I really need to fix this?3) what did I wipe out by the typo?
Any/all help or suggestions would be GREATLY appreciated.
Regards,
George...--
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Old 09-25-2012, 07:55 AM
Tim
 
Default New 3tb hdd thinks it's 801.6 GB

On Mon, 2012-09-24 at 23:04 -0700, George R Goffe wrote:

> I'm more than a little confused. I got a new 3tb seagate hdd and
> typo'd by placing a filesystem on /dev/sdc instead of /dev/sdc1. Now
> the drive thinks it's a 801.6 GB. At least this is what fdisk -l
> reports.
>
> Some questions:
>
> 1) how do I "fix" this?
> 2) do I really need to fix this?
> 3) what did I wipe out by the typo?

Well, if you haven't put any files on, and are just going to restart
setting up your drive, it will be fairly easy.

With fdisk, you could erase partitions and start again. Just look at
the menu of options, and find the appropriate one.

If you're not using fdisk, or can't find a suitable erase partition
option, you could zero out the first few blocks of the drive, using
"dd", then any partitioning tool that you use will view the drive as a
complete blank, and let you start again. You could copy probably about
4kb of null data from /dev/zero using the dd command. Perhaps twice
that amount to be doubly sure.

--
[tim@localhost ~]$ uname -r
2.6.27.25-78.2.56.fc9.i686

Don't send private replies to my address, the mailbox is ignored. I
read messages from the public lists.



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Old 09-27-2012, 05:08 AM
George R Goffe
 
Default New 3tb hdd thinks it's 801.6 GB

Tim,
Thanks for your response.
I had tried what you suggested but the system still reports 801.6 GB.
I have seen some mention of firmware problems but the asus.com web site seems to have
firmware carefully hidden.
What are your thoughts?

George...****
fdisk -l /dev/sdb

Disk /dev/sdb: 801.6 GB, 801569726464 bytes
255 heads, 63 sectors/track, 97451 cylinders, total 1565565872 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x52f115ab

** Device Boot***** Start******** End***** Blocks** Id* System
Here's what dmesg says:
** 2943 [160827.397064] scsi9 : usb-storage 2-1.4.4:1.0
** 2944 [160828.398507] scsi 9:0:0:0: Direct-Access**** ST3000DM 001-9YN166*********** PQ: 0 ANSI: 2 CCS
** 2945 [160828.400114] sd 9:0:0:0: Attached scsi generic sg2 type 0
** 2946 [160828.400635] sd 9:0:0:0: [sdb] 1565565872 512-byte logical blocks: (801 GB/746 GiB)
** 2947 [160828.401611] sd 9:0:0:0: [sdb] Write Protect is off
** 2948 [160828.401615] sd 9:0:0:0: [sdb] Mode Sense: 00 38 00 00
** 2949 [160828.402650] sd 9:0:0:0: [sdb]
Asking for cache data failed
** 2950 [160828.402661] sd 9:0:0:0: [sdb] Assuming drive cache: write through
** 2951 [160828.406626] sd 9:0:0:0: [sdb] Asking for cache data failed
** 2952 [160828.406629] sd 9:0:0:0: [sdb] Assuming drive cache: write through
** 2953 [160828.415219]* sdb: unknown partition table
** 2954 [160828.418199] sd 9:0:0:0: [sdb] Asking for cache data failed
** 2955 [160828.418202] sd 9:0:0:0: [sdb] Assuming drive cache: write through
** 2956 [160828.418205] sd 9:0:0:0: [sdb] Attached SCSI disk

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Old 09-27-2012, 06:49 AM
Marko Vojinovic
 
Default New 3tb hdd thinks it's 801.6 GB

On Wednesday, 26. September 2012. 22.08.50 George R Goffe wrote:
> I had tried what you suggested but the system still reports 801.6 GB.
>
> I have seen some mention of firmware problems but the asus.com web site
> seems to have firmware carefully hidden.
>
> What are your thoughts?
[snip]
> fdisk -l /dev/sdb

The fdisk utility is known to not work properly on devices larger than 3TB.
You want to use parted (or some gui version like gparted) to create a new
partition table.

HTH, :-)
Marko


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Old 09-27-2012, 07:18 PM
Bill Davidsen
 
Default New 3tb hdd thinks it's 801.6 GB

Marko Vojinovic wrote:

On Wednesday, 26. September 2012. 22.08.50 George R Goffe wrote:

I had tried what you suggested but the system still reports 801.6 GB.

I have seen some mention of firmware problems but the asus.com web site
seems to have firmware carefully hidden.

What are your thoughts?

[snip]

fdisk -l /dev/sdb


The fdisk utility is known to not work properly on devices larger than 3TB.
You want to use parted (or some gui version like gparted) to create a new
partition table.

I wish that were not the case, but AFAIK this is true, I thought it worked up to
and including 3TB and failed after that, but there are issues.


Note: you may get better results with fdisk turning off compatibility (c) and on
physical block addressing (u). Both commands from memory. Check that the
physical sector size is correct, presumably it's 4k. And in case, when you
create the filesystem, be sure to use appropriate options for the sector size, etc.


You may have to learn partd, which is seriously different.


--
Bill Davidsen <davidsen@tmr.com>
"We have more to fear from the bungling of the incompetent than from
the machinations of the wicked." - from Slashdot
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Old 09-27-2012, 08:02 PM
John Austin
 
Default New 3tb hdd thinks it's 801.6 GB

On Thu, 2012-09-27 at 15:18 -0400, Bill Davidsen wrote:
> Marko Vojinovic wrote:
> > On Wednesday, 26. September 2012. 22.08.50 George R Goffe wrote:
> >> I had tried what you suggested but the system still reports 801.6 GB.
> >>
> >> I have seen some mention of firmware problems but the asus.com web site
> >> seems to have firmware carefully hidden.
> >>
> >> What are your thoughts?
> > [snip]
> >> fdisk -l /dev/sdb
> >
> > The fdisk utility is known to not work properly on devices larger than 3TB.
> > You want to use parted (or some gui version like gparted) to create a new
> > partition table.
> >
> I wish that were not the case, but AFAIK this is true, I thought it worked up to
> and including 3TB and failed after that, but there are issues.
>
> Note: you may get better results with fdisk turning off compatibility (c) and on
> physical block addressing (u). Both commands from memory. Check that the
> physical sector size is correct, presumably it's 4k. And in case, when you
> create the filesystem, be sure to use appropriate options for the sector size, etc.
>
> You may have to learn partd, which is seriously different.
>
>
> --
> Bill Davidsen <davidsen@tmr.com>
> "We have more to fear from the bungling of the incompetent than from
> the machinations of the wicked." - from Slashdot

Why not gdisk ?
http://www.rodsbooks.com/gdisk/

John


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Old 09-28-2012, 01:35 PM
Rich Bishop
 
Default New 3tb hdd thinks it's 801.6 GB

I came across this exact problem yesterday. The drive works fine when installed
internally, but shows up as 801GB when plugged into my USB-SATA adapter. It
appears that the SATA chipset also needs to support drives >2TB.

Rich

On Wed, Sep 26, 2012 at 10:08:50PM -0700, George R Goffe wrote:
>
> Tim,
>
> Thanks for your response.
>
> I had tried what you suggested but the system still reports 801.6 GB.
>
> I have seen some mention of firmware problems but the asus.com web site seems
> to have firmware carefully hidden.
>
> What are your thoughts?
>
> George...
>
> fdisk -l /dev/sdb
>
> Disk /dev/sdb: 801.6 GB, 801569726464 bytes
> 255 heads, 63 sectors/track, 97451 cylinders, total 1565565872 sectors
> Units = sectors of 1 * 512 = 512 bytes
> Sector size (logical/physical): 512 bytes / 512 bytes
> I/O size (minimum/optimal): 512 bytes / 512 bytes
> Disk identifier: 0x52f115ab
>
> Device Boot Start End Blocks Id System
>
> Here's what dmesg says:
>
> 2943 [160827.397064] scsi9 : usb-storage 2-1.4.4:1.0
> 2944 [160828.398507] scsi 9:0:0:0: Direct-Access ST3000DM
> 001-9YN166 PQ: 0 ANSI: 2 CCS
> 2945 [160828.400114] sd 9:0:0:0: Attached scsi generic sg2 type 0
> 2946 [160828.400635] sd 9:0:0:0: [sdb] 1565565872 512-byte logical blocks:
> (801 GB/746 GiB)
> 2947 [160828.401611] sd 9:0:0:0: [sdb] Write Protect is off
> 2948 [160828.401615] sd 9:0:0:0: [sdb] Mode Sense: 00 38 00 00
> 2949 [160828.402650] sd 9:0:0:0: [sdb] Asking for cache data failed
> 2950 [160828.402661] sd 9:0:0:0: [sdb] Assuming drive cache: write through
> 2951 [160828.406626] sd 9:0:0:0: [sdb] Asking for cache data failed
> 2952 [160828.406629] sd 9:0:0:0: [sdb] Assuming drive cache: write through
> 2953 [160828.415219] sdb: unknown partition table
> 2954 [160828.418199] sd 9:0:0:0: [sdb] Asking for cache data failed
> 2955 [160828.418202] sd 9:0:0:0: [sdb] Assuming drive cache: write through
> 2956 [160828.418205] sd 9:0:0:0: [sdb] Attached SCSI disk
>

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