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Date:      Sun, 24 Jun 2012 12:22:29 +0100
From:      maxim naumov <muxx.mailinglists@gmail.com>
To:        Hans Petter Selasky <hselasky@c2i.net>
Cc:        freebsd-usb@freebsd.org
Subject:   Re: Seagate FreeAgent GoFlex 1.5TB external HDD problems
Message-ID:  <CAGG2AkL0G3GP8Vh_P4_q-mNvTvaZvsoEHeR%2BJdmAZRfGMde40g@mail.gmail.com>
In-Reply-To: <201206241128.36540.hselasky@c2i.net>
References:  <CAGG2Ak%2BXmWvCb3PQoqPXAW7iC0PAQ=GNV79MhhGHjLO4GmWgdw@mail.gmail.com> <201206231551.21894.hselasky@c2i.net> <CAGG2AkLS_AqzWOSrMgkoBzq=9KAfXCr_1yY0yq3J6h5TqT9GwQ@mail.gmail.com> <201206241128.36540.hselasky@c2i.net>

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On Sun, Jun 24, 2012 at 10:28 AM, Hans Petter Selasky <hselasky@c2i.net> wrote:

> Here is a quick analysis:
>   ^^^^  LBA = 0x2FC2B95F00, COUNT=0x80 (64K)

IIRC, LBA is a sector index. how can it be 0x2FC2B95F00 if the whole
HDD has 0xAEA87B30 sectors?

> dd if=/dev/daX of=/dev/null bs=512 iskip=205130391296 count=128

root@muxx:/home/muxx # dd if=/dev/da0 of=/dev/null bs=512
skip=205130391296 count=128
dd: /dev/da0: Input/output error
0+0 records in
0+0 records out
0 bytes transferred in 0.000318 secs (0 bytes/sec)

(no errors in logs)

if 0x2FC2B95F00 is a byte address,

root@muxx:/home/muxx # dd if=/dev/da0 of=/dev/null bs=512
skip=400645295 count=128
128+0 records in
128+0 records out
65536 bytes transferred in 0.062703 secs (1045183 bytes/sec)

(no errors in logs)

however, I don't see 0x2FC2B95F00 anywhere while dumping with usbdump.

I am quite puzzled. I will try and write the whole partition with
zeroes and large block size in the meantime.

/maxOn Sun, Jun 24, 2012 at 10:28 AM, Hans Petter Selasky
<hselasky@c2i.net> wrote:

> Here is a quick analysis:
>   ^^^^  LBA = 0x2FC2B95F00, COUNT=0x80 (64K)

IIRC, LBA is a sector index. how can it be 0x2FC2B95F00 if the whole
HDD has 0xAEA87B30 sectors?

> dd if=/dev/daX of=/dev/null bs=512 iskip=205130391296 count=128

root@muxx:/home/muxx # dd if=/dev/da0 of=/dev/null bs=512
skip=205130391296 count=128
dd: /dev/da0: Input/output error
0+0 records in
0+0 records out
0 bytes transferred in 0.000318 secs (0 bytes/sec)

(no errors in logs)

if 0x2FC2B95F00 is a byte address,

root@muxx:/home/muxx # dd if=/dev/da0 of=/dev/null bs=512
skip=400645295 count=128
128+0 records in
128+0 records out
65536 bytes transferred in 0.062703 secs (1045183 bytes/sec)

(no errors in logs)

however, I don't see 0x2FC2B95F00 anywhere while dumping with usbdump.

I am quite puzzled. I will try and write the whole partition with
zeroes and large block size in the meantime.

/max



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