05-30-2005
Direct disk access
Is there any way to write to disk sector by sector, without any files, filesystems etc. I did that in DOS, but that was DOS.
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
Hello,
I've booted a Digital Unix 4.0D system from cd-rom and I need to access the system's disk drives. I need to run the fixfdmn utility on the root domain so I need to create the root domain in /etc/fdmns.
Could someone tell me how to access my system's disk drives after I've booted from... (1 Reply)
Discussion started by: xadamz23
1 Replies
2. HP-UX
Hi,
I have an HP RX4640 running HP-UX 11iv3 with two internal disks and its connected to a HP disk system 2400 with fibre cable.
If the storage system is online before the server is on then the server can't find the disks. And I get the following error messages:
vgchange: Warning: Couldn't... (3 Replies)
Discussion started by: hoff
3 Replies
3. Solaris
Hey
Is there any way to differentiate if a user is logged directly into a UNIX functional account or if they have scsu'ed into the functional account?
Cheers
Paul (2 Replies)
Discussion started by: runnerpaul
2 Replies
4. Linux
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)
Discussion started by: shen747
23 Replies
5. Solaris
Here is my problem:
I have an 1.5TB disk with OpenSolaris (b134, b151a) using non AHCI. I then changed to AHCI in BIOS, which results in severe problems: I can not boot the system.
I suspect the problem is because I changed to AHCI. Now I have changed back to non AHCI, but still I can not... (0 Replies)
Discussion started by: kebabbert
0 Replies
6. AIX
Hello,
I try to access to data after connect a new disk (hdisk1) to a AIX 7.1 system
This new disk was assigned to a rootvg from another AIX 6.1 system.
It seem not assigned to any vg
but if I tried to assigned hdisk1 to rootvg i get :
Data seem to be always here ... ouf ;-)... (4 Replies)
Discussion started by: Voran
4 Replies
7. AIX
Hello everyone,
Can anyone help me please. I want to disable SSH direct access for an AIX user.
For example, if I have USER1 and USER2. I want to disactivate direct access for USER2. The user must enter his login (USER1) and his password and then he can do su - USER2 .
Thanks, (3 Replies)
Discussion started by: adilyos
3 Replies
8. Shell Programming and Scripting
Hi guys,
been scratching round the forums and my mountain of resources.
Maybe I havn't read deep enough
My question is not how sed edits a stream and outputs it to a file, rather something like this below:
I have a .txt with some text in it :rolleyes:
abc:123:xyz
123:abc:987... (7 Replies)
Discussion started by: the0nion
7 Replies
9. Shell Programming and Scripting
Hi,
I am working on Sun Solaris 5.10 and want to direct the output from a disk space check script to an output file;
#!/bin/bash
CURRENT=$(df -k /log/logs | grep /log/logs | awk '{ print $5}' | sed 's/%//g')
THRESHOLD=30
if ; then
echo "Remaining free space is low" > output.txt
else... (10 Replies)
Discussion started by: SSKAAB
10 Replies
10. AIX
Hello,
I would like to confirm whether the below procedure is correct.
disabled direct super user access on AIX server using below procedure. Please let me know if there is any additional step.
1) confirm the access to HMC, console to reach the LPARs
2) chuser rlogin=false root
... (3 Replies)
Discussion started by: dio34
3 Replies
hdio(7I) Ioctl Requests hdio(7I)
NAME
hdio - SMD and IPI disk control operations
SYNOPSIS
#include <sys/hdio.h>
DESCRIPTION
Note - The SMC and IPI drivers have been discontinued. dkio(7I) is now the preferred method for retrieving disk information.
The SMD and IPI disk drivers supplied with this release support a set of ioctl(2) requests for diagnostics and bad sector information.
Basic to these ioctl() requests are the definitions in <sys/hdio.h>.
IOCTLS
HDKIOCGTYPE The argument is a pointer to a hdk_type structure (described below). This ioctl() gets specific information from the hard
disk.
HDKIOCSTYPE The argument is a pointer to a hdk_type structure (described below). This ioctl() sets specific information about the hard
disk.
/*
* Used for drive info
*/
struct hdk_type {
ushort_t hdkt_hsect; /* hard sector count (read only) */
ushort_t hdkt_promrev; /* prom revision (read only) */
uchar_t hdkt_drtype; /* drive type (ctlr specific) */
uchar_t hdkt_drstat; /* drive status (ctlr specific, ro) */
};
HDKIOCGBAD The argument is a pointer to a hdk_badmap structure (described below). This ioctl() is used to get the bad sector map from
the disk.
HDKIOCSBAD The argument is a pointer to a hdk_badmap structure (described below). This ioctl() is used to set the bad sector map on
the disk.
/*
* Used for bad sector map
*/
struct hdk_badmap {
caddr_t hdkb_bufaddr; /* address of user's map buffer */
};
HDKIOCGDIAG The argument is a pointer to a hdk_diag structure (described below). This ioctl() gets the most recent command that failed
along with the sector and error number from the hard disk.
/*
* Used for disk diagnostics
*/
struct hdk_diag {
ushort_t hdkd_errcmd; /* most recent command in error */
daddr_t hdkd_errsect; /* most recent sector in error */
uchar_t hdkd_errno; /* most recent error number */
uchar_t hdkd_severe; /* severity of most recent error */
};
SEE ALSO
ioctl(2), dkio(7I)
SunOS 5.10 13 Aug 2002 hdio(7I)