Last night I did some speed tests on the CF card slot and PCMCIA card slot. Here is what I did
Inset a PNY Ultra DMA 4GB card into CF slot
dd 1GB of data from /dev/zero to the card and time it
dd 1GB file just created to /dev/null and time it
Repeat the above with a generic 2GB (microcenter) card
Repeat both the above using the PCMCIA slot (via a trancend pcmcia to CF converter)
All measurements came out at about 1.6 MB/s (mega bytes per second)
Not exactly fast.
Dave.
PCMCIA and CF Slot speeds
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Re: PCMCIA and CF Slot speeds
I figure this would be the best place to add my hdparm results. I recall a request on drive speeds. Here are my results. Please note hdparm is not a real world test, but good information can be gathered.
**********NOTE***********
This is on a modified system. I have sym links for /home, /usr/bin, /usr/lib, and /usr/local which were all moved to the CF disk. This on top of XFCE4 loaded on quotaholics IceWM image of Debian Lenny. I will try this on a less modified install to see if results differ.
**************************
Hard disk tests internal=hda vs. Compact Flash=hdc
Internal hda
webdt@WebDT366:/hdc7/Debian5-LXDE-WebDT366-1.0$ sudo hdparm -Tt /dev/hda
/dev/hda:
Timing cached reads: 62 MB in 2.01 seconds = 30.91 MB/sec
Timing buffered disk reads: 6 MB in 4.37 seconds = 1.37 MB/sec
webdt@WebDT366:/hdc7/Debian5-LXDE-WebDT366-1.0$ sudo hdparm -Tt /dev/hda1
/dev/hda1:
Timing cached reads: 64 MB in 2.00 seconds = 31.92 MB/sec
Timing buffered disk reads: 6 MB in 4.31 seconds = 1.39 MB/sec
Compact Flash hdc 4GB Transcend X266
webdt@WebDT366:/hdc7/Debian5-LXDE-WebDT366-1.0$ sudo hdparm -Tt /dev/hdc
/dev/hdc:
Timing cached reads: 52 MB in 2.00 seconds = 26.00 MB/sec
Timing buffered disk reads: 4 MB in 3.12 seconds = 1.28 MB/sec
webdt@WebDT366:/hdc7/Debian5-LXDE-WebDT366-1.0$ sudo hdparm -Tt /dev/hdc7
/dev/hdc7:
Timing cached reads: 52 MB in 2.00 seconds = 25.96 MB/sec
Timing buffered disk reads: 4 MB in 3.08 seconds = 1.30 MB/sec
webdt@WebDT366:/hdc7/Debian5-LXDE-WebDT366-1.0$ sudo hdparm -Tt /dev/hdc5
/dev/hdc5:
Timing cached reads: 50 MB in 2.00 seconds = 24.95 MB/sec
Timing buffered disk reads: 4 MB in 3.11 seconds = 1.29 MB/sec
**********NOTE***********
This is on a modified system. I have sym links for /home, /usr/bin, /usr/lib, and /usr/local which were all moved to the CF disk. This on top of XFCE4 loaded on quotaholics IceWM image of Debian Lenny. I will try this on a less modified install to see if results differ.
**************************
Hard disk tests internal=hda vs. Compact Flash=hdc
Internal hda
webdt@WebDT366:/hdc7/Debian5-LXDE-WebDT366-1.0$ sudo hdparm -Tt /dev/hda
/dev/hda:
Timing cached reads: 62 MB in 2.01 seconds = 30.91 MB/sec
Timing buffered disk reads: 6 MB in 4.37 seconds = 1.37 MB/sec
webdt@WebDT366:/hdc7/Debian5-LXDE-WebDT366-1.0$ sudo hdparm -Tt /dev/hda1
/dev/hda1:
Timing cached reads: 64 MB in 2.00 seconds = 31.92 MB/sec
Timing buffered disk reads: 6 MB in 4.31 seconds = 1.39 MB/sec
Compact Flash hdc 4GB Transcend X266
webdt@WebDT366:/hdc7/Debian5-LXDE-WebDT366-1.0$ sudo hdparm -Tt /dev/hdc
/dev/hdc:
Timing cached reads: 52 MB in 2.00 seconds = 26.00 MB/sec
Timing buffered disk reads: 4 MB in 3.12 seconds = 1.28 MB/sec
webdt@WebDT366:/hdc7/Debian5-LXDE-WebDT366-1.0$ sudo hdparm -Tt /dev/hdc7
/dev/hdc7:
Timing cached reads: 52 MB in 2.00 seconds = 25.96 MB/sec
Timing buffered disk reads: 4 MB in 3.08 seconds = 1.30 MB/sec
webdt@WebDT366:/hdc7/Debian5-LXDE-WebDT366-1.0$ sudo hdparm -Tt /dev/hdc5
/dev/hdc5:
Timing cached reads: 50 MB in 2.00 seconds = 24.95 MB/sec
Timing buffered disk reads: 4 MB in 3.11 seconds = 1.29 MB/sec
Last edited by volkswagner on Mon May 11, 2009 5:06 pm, edited 1 time in total.
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