12-30-2007
Quote:
Originally Posted by
rednex
Usually a hard disk keeps spare sectors that are not visible to the user. Whenever the disk encounters a bad block the disk internally replaces these bad blocks from the spare sectors. This operation is completely translucent to the user. There seems to be a specific number of spare sectors on any hard disk that is used for recovering from bad blocks. But once the disk runs out of spare sectors in the process of replacing bad blocks, all future bad blocks will become medium errors (unrecoverable). If the number of available spare sectors can be found then the user can be informed much earlier that its time to backup this disk as it would soon become faulty.
See the SourceForge project called SMART:
smartmontools Home Page (last updated $Date: 2007/10/26 21:49:03 $)
Quote:
The smartmontools package contains two utility programs (smartctl and smartd) to control and monitor storage systems using the Self-Monitoring, Analysis and Reporting Technology System (SMART) built into most modern ATA and SCSI hard disks. In many cases, these utilities will provide advanced warning of disk degradation and failure.
Smartmontools is originally derived from the Linux smartsuite package, and includes support for ATA/ATAPI-3 to -7 disks and SCSI disk and tape devices. It should run on any modern Darwin (Mac OSX), Linux, FreeBSD, NetBSD, OpenBSD, Solaris, OS/2, eComStation or Windows system. Alternatively, it can also be run from one of the bootable CDs or floppies containing smartmontools.
See also:
Monitoring Hard Disks with SMART
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PARTX(8) System Manager's Manual PARTX(8)
NAME
partx - telling the kernel about presence and numbering of on-disk partitions.
SYNOPSIS
partx [-a|-d|-l] [--type TYPE] [--nr M-N] [partition] disk
DESCRIPTION
Given a block device ( disk ) and a partition table type , try to parse the partition table, and list the contents. Optionally add or
remove partitions.
This is not an fdisk - adding and removing partitions is not a change of the disk, but just telling the kernel about presence and numbering
of on-disk partitions.
OPTIONS
-a add specified partitions or read disk and add all partitions
-d delete specified or all partitions
-l list partitions. Note that the all numbers are in 512-byte sectors.
--type TYPE
Specify the partition type -- dos, bsd, solaris, unixware or gpt.
--nr M-N
Specify the range of partitions (e.g --nr 2-4).
SEE ALSO
addpart(8), delpart(8), fdisk(8), parted(8), partprobe(8)
AVAILABILITY
The partx command is part of the util-linux-ng package and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux-ng/.
11 Jan 2007 PARTX(8)