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Re: media descriptor issue help please

On Fri, 2007-10-26 at 16:04 -0700, Dave Stevens wrote:
> Hi,
> I have a F7 box that works fine. Recently a Windows computer was hit by a 
> stray 220 volt jolt and the power supply died. I will in due course replace 
> the power supply and see if the mobo is hooped, but for the moment I am 
> really interested in seeing if I can recover the data off the drive. I've put 
> the drive, a Seagate ATA 40 gig into the F7 drive where it lives alongside 
> the primary (F7) drive, a Seagate SATA 320.
> The BIOS correctly detects the type and model of the ATA drive and the dmesg 
> messages indicate that it is correctly detected. The BIOS messages state the 
> capacity and interface correctly and say that S.M.A.R.T. is enabled and no 
> errors are detected. If I set the box to boot from the ATA drive Windows XP 
> tries to boot and offers a set of boot options. No matter which one I choose 
> Windows starts to boot then acts as if it can't deal with the drastically 
> different hardware it finds and reboots.
> This leads me to believe that there is recoverable data on the drive but I 
> can't mount it in F7. Messages from dmesg read in part as below:
> ata7: PATA max UDMA/133 cmd 0x00000000000101f0 ctl 0x00000000000103f6 bmdma 
> 0x000000000001ffa0 irq 14
> ata8: PATA max UDMA/133 cmd 0x0000000000010170 ctl 0x0000000000010376 bmdma 
> 0x000000000001ffa8 irq 15
> ata7.00: ATA-6: ST340810A, 3.39, max UDMA/100
> ata7.00: 78165360 sectors, multi 16: LBA 
> ata7.00: configured for UDMA/100
> The drive is jumpered and cabled as primary master
> A mounting attempt onto empty directory /mnt/win gives :
> [root localhost mnt]# mount /dev/sdb -t vfat win
> mount: wrong fs type, bad option, bad superblock on /dev/sdb,
>        missing codepage or other error
>        In some cases useful info is found in syslog - try
>        dmesg | tail  or so
> [root localhost mnt]#  dmesg | tail
> Bluetooth: HIDP (Human Interface Emulation) ver 1.2
> ip6_tables: (C) 2000-2006 Netfilter Core Team
> ip_tables: (C) 2000-2006 Netfilter Core Team
> Netfilter messages via NETLINK v0.30.
> nf_conntrack version 0.5.0 (8192 buckets, 65536 max)
> eth0: no IPv6 routers present
> hfs: unable to find HFS+ superblock
> hfs: unable to find HFS+ superblock
> FAT: invalid media value (0xb9)
> VFS: Can't find a valid FAT filesystem on dev sdb.
> So it seems that there is an invalid media descriptor on the ATA drive. But 
> the information seems to not be conclusive because in fact the Windows boot 
> sector is detected and a partial boot into Windows does in fact take place. I 
> don't know what to make of this or what to do next.
> Ideas? Diagnostics?
mount a partition, not a device

mount -t vfat /dev/sdb1 /mnt/win

are you CERTAIN that it was fat formatted volume and not ntfs ?

yum install ntfs-3g
mount /dev/sdb1 /mnt/win


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