[mythtv-users] How much horespower for frontend?

[James Pifer]

> hdparm -i /dev/hda 
> 
> will answer this question. Here is an example of a 3 year old 40 gb
> ide drive on my dual processor opteron 850 
> 
> # hdparm -i /dev/hda
> 
> /dev/hda:
> 
>  Model=WDC WD400JB-00ENA0, FwRev=05.03E05, SerialNo=WD-WCAD18755665
>  Config={ HardSect NotMFM HdSw>15uSec SpinMotCtl Fixed DTR>5Mbs
> FmtGapReq }
>  RawCHS=16383/16/63, TrkSize=57600, SectSize=600, ECCbytes=40 
>  BuffType=DualPortCache, BuffSize=8192kB, MaxMultSect=16, MultSect=off
>  CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=78165360
>  IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120}
>  PIO modes:  pio0 pio1 pio2 pio3 pio4 
>  DMA modes:  mdma0 mdma1 mdma2
>  UDMA modes: udma0 udma1 udma2 udma3 udma4 *udma5
>  AdvancedPM=no WriteCache=enabled
>  Drive conforms to: Unspecified:  ATA/ATAPI-1 ATA/ATAPI-2 ATA/ATAPI-3
> ATA/ATAPI-4 ATA/ATAPI-5 
> 
>  * signifies the current active mode
> 
> And here is the benchmark.
> # hdparm -tT /dev/hda
> 
> /dev/hda:
>  Timing cached reads:   3420 MB in  2.00 seconds = 1710.47 MB/sec
>  Timing buffered disk reads:  140 MB in  3.01 seconds =  46.47 MB/sec
> 
> Now compare that to a 6 month old sata2 disk:
>  # hdparm -tT /dev/sda
> 
> /dev/sda:
>  Timing cached reads:   3008 MB in  2.00 seconds = 1504.51 MB/sec
>  Timing buffered disk reads:  230 MB in  3.02 seconds =  76.15 MB/sec
> 
> 

Mine are:
[root at mythtv ~]# hdparm -i /dev/hda

/dev/hda:

 Model=ST3200822A, FwRev=3.01, SerialNo=4LJ3693F
 Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs RotSpdTol>.5% }
 RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=4
 BuffType=unknown, BuffSize=8192kB, MaxMultSect=16, MultSect=16
 CurCHS=4047/16/255, CurSects=16511760, LBA=yes, LBAsects=268435455
 IORDY=on/off, tPIO={min:240,w/IORDY:120}, tDMA={min:120,rec:120}
 PIO modes:  pio0 pio1 pio2 pio3 pio4
 DMA modes:  mdma0 mdma1 mdma2
 UDMA modes: udma0 udma1 udma2 udma3 udma4 *udma5
 AdvancedPM=no WriteCache=enabled
 Drive conforms to: ATA/ATAPI-6 T13 1410D revision 2:  ATA/ATAPI-1
ATA/ATAPI-2 ATA/ATAPI-3 ATA/ATAPI-4 ATA/ATAPI-5 ATA/ATAPI-6

 * signifies the current active mode

[root at mythtv ~]# hdparm -i /dev/hdb

/dev/hdb:

 Model=WDC WD100BA, FwRev=P73CA30A, SerialNo=WD-WM9290204190
 Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs }
 RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=34
 BuffType=DualPortCache, BuffSize=1961kB, MaxMultSect=16, MultSect=16
 CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=19541088
 IORDY=on/off, tPIO={min:240,w/IORDY:120}, tDMA={min:120,rec:120}
 PIO modes:  pio0 pio1 pio2 pio3 pio4
 DMA modes:  mdma0 mdma1 mdma2
 UDMA modes: udma0 udma1 udma2 udma3 *udma4
 AdvancedPM=no WriteCache=enabled
 Drive conforms to: ATA/ATAPI-4 T13 1153D revision 17:  ATA/ATAPI-1
ATA/ATAPI-2 ATA/ATAPI-3 ATA/ATAPI-4

 * signifies the current active mode

[root at mythtv ~]# hdparm -i /dev/hdc

/dev/hdc:

 Model=Maxtor 6Y160P0, FwRev=YAR41BW0, SerialNo=Y42PL0TE
 Config={ Fixed }
 RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=57
 BuffType=DualPortCache, BuffSize=7936kB, MaxMultSect=16, MultSect=16
 CurCHS=4047/16/255, CurSects=16511760, LBA=yes, LBAsects=268435455
 IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120}
 PIO modes:  pio0 pio1 pio2 pio3 pio4
 DMA modes:  mdma0 mdma1 mdma2
 UDMA modes: udma0 udma1 *udma2 udma3 udma4 udma5 udma6
 AdvancedPM=yes: disabled (255) WriteCache=enabled
 Drive conforms to: (null):  ATA/ATAPI-1 ATA/ATAPI-2 ATA/ATAPI-3
ATA/ATAPI-4 ATA/ATAPI-5 ATA/ATAPI-6 ATA/ATAPI-7

 * signifies the current active mode

[root at mythtv ~]# hdparm -i /dev/hdd

/dev/hdd:

 Model=Maxtor 6Y160P0, FwRev=YAR41BW0, SerialNo=Y428E7SE
 Config={ Fixed }
 RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=57
 BuffType=DualPortCache, BuffSize=7936kB, MaxMultSect=16, MultSect=16
 CurCHS=4047/16/255, CurSects=16511760, LBA=yes, LBAsects=268435455
 IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120}
 PIO modes:  pio0 pio1 pio2 pio3 pio4
 DMA modes:  mdma0 mdma1 mdma2
 UDMA modes: udma0 udma1 *udma2 udma3 udma4 udma5 udma6
 AdvancedPM=yes: disabled (255) WriteCache=enabled
 Drive conforms to: (null):  ATA/ATAPI-1 ATA/ATAPI-2 ATA/ATAPI-3
ATA/ATAPI-4 ATA/ATAPI-5 ATA/ATAPI-6 ATA/ATAPI-7

 * signifies the current active mode

[root at mythtv ~]#