LinuxQuestions.org - hdparm risky parameters

Quote:

Originally Posted by props666999

Hi

I will stuck valuable data on a 200Gig hard disk and was wondering if
the following hdparm parameters stress my cdrom and hard drive
hdparm -X34 -d1 -u1 /dev/hda (hard disk)
hdparm -X34 -d1 -u1 /dev/hdb (cdrom)

i found those on the net

if it is safe, is there anything i could do to improve speed

using the above rules i can copy data from cdrom to hard disk
at 3.7MB/Sec.

it seems very slow to me

regards

Hi,

You should first read the 'man hdparm' to get some reference. The use of arbitrary commands on a drive can cause major problems.

Next do a 'hdparm -I /dev/hda' to find out your known drive information. This information will assist you in determining what you should or can do.

A sample output;

Code:

# hdparm -I /dev/hda



/dev/hda:



ATA device, with non-removable media

        Model Number:      TOSHIBA MK4025GAS                      

        Serial Number:      X5EP9507S

        Firmware Revision:  KA100A  

Standards:

        Supported: 6 5 4 3 

        Likely used: 6

Configuration:

        Logical        max    current

        cylinders      16383  65535

        heads          16      1

        sectors/track  63      63

        --

        CHS current addressable sectors:    4128705

        LBA    user addressable sectors:  78140160

        device size with M = 1024*1024:      38154 MBytes

        device size with M = 1000*1000:      40007 MBytes (40 GB)

Capabilities:

        LBA, IORDY(can be disabled)

        bytes avail on r/w long: 48    Queue depth: 1

        Standby timer values: spec'd by Standard, no device specific minimum

        R/W multiple sector transfer: Max = 16  Current = 16

        Advanced power management level: unknown setting (0x0080)

        DMA: sdma0 sdma1 sdma2 mdma0 mdma1 mdma2 udma0 udma1 *udma2 udma3 udma4 udma5 

            Cycle time: min=120ns recommended=120ns

        PIO: pio0 pio1 pio2 pio3 pio4 

            Cycle time: no flow control=120ns  IORDY flow control=120ns

Commands/features:

        Enabled Supported:

          *    NOP cmd

          *    READ BUFFER cmd

          *    WRITE BUFFER cmd

          *    Host Protected Area feature set

          *    Look-ahead

          *    Write cache

          *    Power Management feature set

                Security Mode feature set

                SMART feature set

          *    Mandatory FLUSH CACHE command 

          *    Device Configuration Overlay feature set 

                SET MAX security extension

          *    Advanced Power Management feature set

          *    SMART self-test 

          *    SMART error logging 

Security: 

        Master password revision code = 65534

                supported

        not    enabled

        not    locked

        not    frozen

        not    expired: security count

        not    supported: enhanced erase

        36min for SECURITY ERASE UNIT. 

HW reset results:

        CBLID- above Vih

        Device num = 0 determined by the jumper

Checksum: correct