As long as there are no overlapping areas, that doesn't matter.
If your SSD is a $500k house, these gaps sum up to less than two tenth of a cent...
Hahaha jlliagre, nice analogy..
Thank for your reply. I am just wondering why are these sectors distributed in such way and how they sums up.
Last question i hope you don't mind, since these are 4k disks, is there any reason why ZFS are aligning them with start sector 256 ? instead of the default 40 ?
Code:
40 = 40 * 512 = 20480bytes
20480bytes/4096=5 x 4k sector - which is in multiples of 4k and should be fine.
First post :) ...
Here is a script for automatic labeling of previously unlabeled disks.
Other methods exist (format -f cmd_file), but I like this because it's all in one place.
#!/bin/ksh
#----------------------
# format_label
# Automatic labeling of previously unlabeled disks
#... (1 Reply)
Is there a way to determine the number of available spare sectors on a disk ? as it may be useful for notifying a user to take a backup of the disk before it runs into a medium error. (6 Replies)
Hello, I need advice on how to check if started processes are finished in perl, here's explanation :
OS is RHEL 4, perl -v = "This is perl, v5.8.0 built for i386-linux-thread-multi"
The logic of the script :
#!/usr/bin/perl
use warnings;
$param1 = $ARGV;
$param2 = $ARGV;
$param3 =... (2 Replies)
I found a document: Bad block HOWTO for smartmontools
My hard drive is Maxtor:
root]# fdisk -lu /dev/hda
Disk /dev/hda: 81.9 GB, 81964302336 bytes
255 heads, 63 sectors/track, 9964 cylinders, total 160086528 sectors
Units = sectors of 1 * 512 = 512 bytes
Disk identifier: 0x3f4e3f4d
... (0 Replies)
Hi all,
I'm kind of new to programming in Linux & c/c++. I'm currently writing a FileManager using Ubuntu Linux(10.10) for Learning Purposes. I've got started on this project by creating a loopback device to be used as my virtual hard disk. After creating the loop back hard disk and mounting it... (23 Replies)
i'm writing some code to simulate the boot progress after power on
but when i try to read the 2nd sector from a floppy disk, this operation always fail with ah=0x80h which means timeout, how can i get over this problem?
my code would be like this:
$ cat boot.S
.code16
#define SETUPLEN 4... (0 Replies)
i'm writing some code to simulate the boot progress after power on
but when i try to read the 2nd sector from a floppy disk, this operation always fail with ah=0x80h which means timeout, how can i get over this problem?
my code would be like this:
$ cat boot.S
.code16
#define SETUPLEN 4... (0 Replies)
i'm writing some code to simulate the boot progress after power on
but when i try to read the 2nd sector from a floppy disk, this operation always fail with ah=0x80h which means timeout, how can i get over this problem?
my code would be like this:
$ cat boot.S
.code16
#define SETUPLEN 4... (0 Replies)
Discussion started by: wljackhero
0 Replies
LEARN ABOUT BSD
badsect
BADSECT(8) System Manager's Manual BADSECT(8)NAME
badsect - create files to contain bad sectors
SYNOPSIS
/sbin/badsect sector ...
DESCRIPTION
Badsect makes a file to contain a bad sector. Normally, bad sectors are made inaccessible by the standard formatter, which provides a for-
warding table for bad sectors to the driver; see bad144(8) for details. If a driver supports the bad blocking standard it is much prefer-
able to use that method to isolate bad blocks, since the bad block forwarding makes the pack appear perfect, and such packs can then be
copied with dd(1). The technique used by this program is also less general than bad block forwarding, as badsect can't make amends for bad
blocks in the i-list of file systems or in swap areas.
Adding a sector which is suddenly bad to the bad sector table currently requires the running of the standard DEC formatter, as UNIX does
not supply formatters. Thus to deal with a newly bad block or on disks where the drivers do not support the bad-blocking standard badsect
may be used to good effect.
Badsect is used on a quiet file system in the following way: First mount the file system, and change to its root directory. Make a direc-
tory BAD there and change into it. Run badsect giving as argument all the bad sectors you wish to add. (The sector numbers should be
given as physical disk sectors relative to the beginning of the file system, exactly as the system reports the sector numbers in its con-
sole error messages.) Then change back to the root directory, unmount the file system and run fsck(8) on the file system. The bad sectors
should show up in two files or in the bad sector files and the free list. Have fsck remove files containing the offending bad sectors, but
do not have it remove the BAD/nnnnn files. This will leave the bad sectors in only the BAD files.
Badsect works by giving the specified sector numbers in a mknod(2) system call (after taking into account the filesystem's block size),
creating a regular file whose first block address is the block containing bad sector and whose name is the bad sector number. The file has
0 length, but the check programs will still consider it to contain the block containing the sector. This has the pleasant effect that the
sector is completely inaccessible to the containing file system since it is not available by accessing the file.
SEE ALSO mknod(2), bad144(8), fsck(8)BUGS
If both sectors which comprise a (1024 byte) disk block are bad, you should specify only one of them to badsect, as the blocks in the bad
sector files actually cover both (bad) disk sectors.
On the PDP-11, only sector number less than 131072 may be specified on 1024-byte block filesystems, 65536 on 512-byte block filesystems.
This is because only a short int is passed to the system from mknod.
3rd Berkeley DistributionBADSECT(8)