Re: Hard drive bad sector warning
On 11/09/11 23:27, consul tores wrote:
> Adding Slackware test information:
>
> bash-4.1# fdisk -l
>
> Disk /dev/sda: 500.1 GB, 500107862016 bytes
> 255 heads, 63 sectors/track, 60801 cylinders, total 976773168 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: 0x7221e240
>
> Device Boot Start End Blocks Id System
> /dev/sda1 * 2048 2457599 1227776 7 HPFS/NTFS/exFAT
> /dev/sda2 2457600 311173119 154357760 7 HPFS/NTFS/exFAT
> /dev/sda3 956293120 976771071 10238976 7 HPFS/NTFS/exFAT
> /dev/sda4 311175166 663324926 176074880+ 5 Extended
> /dev/sda5 311175168 319571967 4198400 82 Linux swap
> /dev/sda6 319574016 565665791 123045888 83 Linux
> /dev/sda7 565665855 663324926 48829536 83 Linux
>
> Partition table entries are not in disk order
> bash-4.1# sfdisk -l
>
> Disk /dev/sda: 60801 cylinders, 255 heads, 63 sectors/track
> Warning: extended partition does not start at a cylinder boundary.
> DOS and Linux will interpret the contents differently.
> Units = cylinders of 8225280 bytes, blocks of 1024 bytes, counting from 0
>
> Device Boot Start End #cyls #blocks Id System
> /dev/sda1 * 0+ 152- 153- 1227776 7 HPFS/NTFS/exFAT
> /dev/sda2 152+ 19369- 19217- 154357760 7 HPFS/NTFS/exFAT
> /dev/sda3 59526+ 60801- 1275- 10238976 7 HPFS/NTFS/exFAT
> /dev/sda4 19369+ 41290- 21921- 176074880+ 5 Extended
> /dev/sda5 19369+ 19892- 523- 4198400 82 Linux swap
> /dev/sda6 19892+ 35211- 15319- 123045888 83 Linux
> /dev/sda7 35211+ 41290- 6079- 48829536 83 Linux
>
> cfdisk (util-linux 2.19)
>
> Disk Drive: /dev/sda
> Size: 500107862016 bytes, 500.1 GB
> Heads: 255 Sectors per Track: 63 Cylinders: 60801
>
> Name Flags Part Type FS Type [Label] Size (MB)
> ------------------------------------------------------------------------------
> Unusable 1.05*
> sda1 Boot Primary ntfs [SYSTEM_DRV] 1257.25*
> sda2 Primary ntfs [Windows7_OS]
> 158062.35*
> Logical Free Space 1.05*
> sda5 NC Logical swap 4299.17*
> sda6 NC Logical ext4 [Debian] 126000.04*
> sda7 Logical reiserfs [Slackware]
> 50001.48*
> Logical Free Space 149999.72*
> sda3 Primary ntfs [Lenovo_Recovery]
> 10484.72*
> Unusable 1.08*
>
>
> [ Help ] [ Print ] [ Quit ] [ Units ] [ Write ]
>
>
> Print help screen
>
>
When you let MS have first bite at the partitioning, GNU/Linux can only
work with the scraps. And fdisk/sfdisk,and, cfdisk can display sectors
[*1] - which is what Debian "sees" *not* CHS.
[*1] -u,-uS,and,-Ps respectively
I'm unclear as to why display/list/print partitions (in CHS) of your
hard drives has any bearing on the ability of those tools to align
sectors and partitions (the OP already knows it's a manual process ie,
look at sectors and divide by 8).
NOTE: fdisk -b 4096 /dev/whatever will deal with 4K sectors. That
shouldn't be necessary with post-Squeeze releases though.
You may already know this, but I found it instructive, from man fdisk:-
There are several *fdisk programs around. Each has its problems and
strengths. Try them in the order cfdisk, fdisk, sfdisk.
Indeed, cfdisk is a beautiful program that has strict requirements on
the partition tables it accepts, and produces high quality partition
tables. Use it if you can.
fdisk is a buggy program that does fuzzy things - usually it happens to
produce reasonable results. Its single advantage is that it has some
support for BSD disk labels and other non-DOS partition tables. Avoid
it if you can.
sfdisk is for hackers only - the user interface is terrible, but it is
more correct than fdisk and more powerful than both fdisk and cfdisk.
Moreover, it can be used noninteractively.)
These days there also is parted. The cfdisk interface is nicer, but
parted does much more: it not only resizes partitions, but also the
filesystems that live in them.
Cheers
--
"They proved that if you quit smoking, it will prolong your life. What
they haven’t proved is that a prolonged life is a good thing. I haven’t
seen the stats on that yet."
— Bill Hicks
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