Re: Velocità HD

[/dev/null <devnull@fastwebnet.it>]

On Sat, Aug 31, 2002 at 11:37:42AM +0200, Sethi wrote:
> Info.... Secondo voi sono parametri accettabili per tre dischi in
> UltraDma100?
> 
> cheope:/home/sethi# hdparm -t /dev/hda /dev/hdb /dev/hdd
>  Timing buffered disk reads:  64 MB in 13.04 seconds =  4.91 MB/sec
>
> cheope:/home/sethi# hdparm -T /dev/hda /dev/hdb /dev/hdd
>  Timing buffer-cache reads:   128 MB in  0.75 seconds =170.67 MB/sec
Assolutamente no. Non stai usando il DMA, secondo me.
Riprova dopo aver fatto
# hdparm -d 1 /dev/hda eccetera
Inoltre: hdparm /dev/hda per sapere quali "flag" sono abilitati, e
hdparm -I /dev/hda per informazioni dettagliate.

Ciao,
/dev/null
P.S.: per la cronaca, l'HD del portatile (quindi una schifezza):
# hdparm -t /dev/hda
/dev/hda:
 Timing buffered disk reads:  64 MB in  3.25 seconds = 19.69 MB/sec

# hdparm -T /dev/hda
/dev/hda:
 Timing buffer-cache reads:   128 MB in  0.41 seconds =312.20 MB/sec

# hdparm -I /dev/hda

/dev/hda:

ATA device, with non-removable media
        Model Number:       IC25N020ATCS04-0                        
        Serial Number:      CSH206D9GREWMB
        Firmware Revision:  CA2OA71A
Standards:
        Used: ATA/ATAPI-5 T13 1321D revision 3 
        Supported: 5 4 3 2 & some of 6
Configuration:
        Logical         max     current
        cylinders       16383   16383
        heads           15      15
        sectors/track   63      63
        --
        CHS current addressable sectors:   15481935
        LBA    user addressable sectors:   39070080
        device size with M = 1024*1024:       19077 MBytes
        device size with M = 1000*1000:       20003 MBytes (20 GB)
Capabilities:
        LBA, IORDY(can be disabled)
        bytes avail on r/w long: 4      Queue depth: 1
        Standby timer values: spec'd by Vendor, no device specific minimum
        R/W multiple sector transfer: Max = 16  Current = 16
        Advanced power management level: 128 (0x80)
        DMA: 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=240ns  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
           *    Device Configuration Overlay feature set 
                SET MAX security extension
                Address Offset Reserved Area Boot
                Power-Up In Standby feature set
           *    Advanced Power Management feature set
           *    SMART self-test 
           *    SMART error logging 
Security: 
        Master password revision code = 65534
                supported
        not     enabled
        not     locked
                frozen
        not     expired: security count
        not     supported: enhanced erase
        22min for SECURITY ERASE UNIT. 
HW reset results:
        CBLID- above Vih
        Device num = 0 determined by the jumper
Checksum: correct