From mboxrd@z Thu Jan 1 00:00:00 1970 To: Cindy Peters Cc: "'linuxppc-embedded@lists.linuxppc.org'" Subject: Re: PCMCIA/IDE transfer rates From: Wolfgang Denk Mime-version: 1.0 Content-type: text/plain; charset=ISO-8859-1 In-reply-to: Your message of "Wed, 15 Aug 2001 10:27:31 CDT." <41EDEC3C1B88D51186EB00A0C9CFADF702FA44@AMWMAIL> Date: Wed, 15 Aug 2001 21:37:52 +0200 Message-Id: <20010815193757.C0F4210CBA@denx.denx.de> Sender: owner-linuxppc-embedded@lists.linuxppc.org List-Id: In message <41EDEC3C1B88D51186EB00A0C9CFADF702FA44@AMWMAIL> you wrote: > > Does anyone know approximately what the transfer rates (peak and > sustainable) would be for a PCMCIA/IDE hard disk on an MPC823? As Dan Malek already pointed out, all implementations that are available to the public so far suffer from the fact that they're using PIO. Here some real-world example: PPCBoot 1.0.4 (Aug 7 2001 - 00:05:44) CPU: PPC823EZTnnB2 at 66 MHz: 16 kB I-Cache 8 kB D-Cache Watchdog enabled DRAM: 16 MB FLASH: 16 MB KEYBD: Version 1.0 PCMCIA: 5.0V card found: ARGOSY PnPIDE D5 Bus 0: OK Device 0: Model: IBM-DKLA-24320 Firm: KL4AA43A Ser#: YD2YD246800 Type: Hard Disk Capacity: 4126.10 MB = 4.0 GB (8452080 x 512) ... Linux version 2.4.4 (wd@denx.denx.de) (gcc version 2.95.2 19991024 (release)) #2 Tue Aug 7 00:17:59 MEST 2001 ... Card ID: ARGOSY PnPIDE D5 hda: probing with STATUS(0x50) instead of ALTSTATUS(0x00) hda: IBM-DKLA-24320, ATA DISK drive ide0 at 0xc7006320-0xc7006327,0xc3006106 on irq 13 hda: 8452080 sectors (4327 MB) w/460KiB Cache, CHS=8944/15/63 Partition check: hda: hda1 hda2 hda3 hda4 ... root@fast:/# bonnie -d /mnt -s 250 -m MPC823E File '/mnt/bonnie.87', size: 262144000 Writing with putc()...done Rewriting...done Writing intelligently...done Reading with getc()...done Reading intelligently...done Seeker 1...Seeker 2...Seeker 3...start 'em...done...done...done... -------Sequential Output-------- ---Sequential Input-- --Random-- -Per Char- --Block--- -Rewrite-- -Per Char- --Block--- --Seeks--- Machine MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU /sec %CPU MPC823E 250 534 90.4 3028 68.6 1533 64.4 542 97.6 3316 94.5 45.2 4.5 Note that this is a normal 2.5" disk drive usually used in laptops - quite slow. You get somewhat better results with a faster 3.5" disk drive. Wolfgang Denk -- Software Engineering: Embedded and Realtime Systems, Embedded Linux Phone: (+49)-8142-4596-87 Fax: (+49)-8142-4596-88 Email: wd@denx.de "There are three principal ways to lose money: wine, women, and engi- neers. While the first two are more pleasant, the third is by far the more certain." - Baron Rothschild, ca. 1800 ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/