Hi all folks, RH7.3 I need to use "hdparm" in single user mode. Kindly advise how to start it. Thanks in advance. B.R. satimis

Booting Single-User Mode http://www.redhat.com/docs/manuals/linux/RHL-7.3-Manual/custom-guide/s1-rescuemode-booting-single.html

One way would be to edit your /etc/innitab file. You should see something similar: # Default runlevel. The runlevels used by RHS are: # 0 - halt (Do NOT set initdefault to this) # 1 - Single user mode # 2 - Multiuser, without NFS (The same as 3, if you do not have networking) # 3 - Full multiuser mode # 4 - unused # 5 - X11 # 6 - reboot (Do NOT set initdefault to this) # id:5:initdefault: Where you see - id:5:initdefault: - change the "5" to the run level number for single-user mode, which in this example is "1". There's probably an easier way, but this one will work. Actually, "telinit 1" from a command prompt would work (in reference to above example). However, it's wise to check the inittab file first because run levels can be different from 1 distro as compared to another.

Hi, Thanks for your advice. # cat /etc/inittab ....... # Default runlevel. The runlevels used by RHS are: # 0 - halt (Do NOT set initdefault to this) # 1 - Single user mode # 2 - Multiuser, without NFS (The same as 3, if you do not have networking) # 3 - Full multiuser mode # 4 - unused # 5 - X11 # 6 - reboot (Do NOT set initdefault to this) id:5:initdefault: ..... .... What does "5" (id:5:) represent for B.Regards satimis

modifying inittab not required: log out from your GUI ctrl alt f1 (or f2,f3 -f6) login as root init 1 hdparm -tT init 5 "5" - man inittab

Hi Dlonra, RH7.3 Thanks for your advice. # init 1 sh-2.05a# hdparm -tT /dev/hda ..... ..... end-request: I/O error, dev 03:00(hda),sector 2008 hda:tray open same I/O error in sectors: 2012, 2016, 2020, 2024, 2028, 2032, 2036, 2040, 2044, 0, etc 4 read ( ) failed: Input/Output error Maybe there are some other errors on top-screen. I don't know how to move up. PageUp and arrow don't work This is a ATA66 7,200 rpm 10G hard disc connected to a PCI ATA66 controller card. It has been used for some times. No error has been found during daily operation. Now I have all important data burnt on CDs. Have you had any idea to fix this I/O error. Thanks in advance. B.Regards satimis