lkml.org 
[lkml]   [2001]   [Apr]   [30]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
SubjectRe: Seagate ST340824A and (un)clipping max LBA: 2.2.19+ide04092001 patch
From

On Sat, Apr 28, 2001 at 12:22:07AM +0200, Andries.Brouwer@cwi.nl wrote:

> No. Maybe someone can tell us about its origin, but in your case
> of course this just works because 0xa intersects 0x306b. You might
> comment out this entire test.

If I comment out the entire test, it would try to unclip the capacity of all
drives. Is it safe? For my situation I would prefer to use "setmax"
or disk specific "seagate" (see later), but I do not know how to change
the kernel idea of drive geometry and capacity. I use 2.2.19 + ide patch.
Neither fdisk nor dd would not read past the clipped capacity before or after
software unclipping.

>
> In the case of this particular disk the manufacturer says:
> Use the Set Features command (EF) with subfunction F1.
> That tells the disk to report full capacity.
> (ATA-6 says that F1 is reserved for use by the Compact Flash Association)
>
> [Could you try that and report identify output before and after?]

Yes, I tried that and it does report unclipped capacity.
seagate.c is attached for reference.

stalex@eagle:~$ sudo hdparm -I /dev/hdb
/dev/hdb:

Model=TS438042 A , FwRev=.350 , SerialNo=H30E0186
Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs RotSpdTol>.5% }
RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=0
BuffType=unknown, BuffSize=2048kB, MaxMultSect=16, MultSect=?16?
CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=66055248
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 udma0 udma1 *udma2 udma3 udma4 udma5
stalex@eagle:~$ sudo /usr/src/seagate /dev/hdb
Using device /dev/hdb
Sending Set Features F1 subcommand
Done.
stalex@eagle:~$ sudo hdparm -I /dev/hdb

/dev/hdb:

Model=TS438042 A , FwRev=.350 , SerialNo=H30E0186
Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs RotSpdTol>.5% }
RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=0
BuffType=unknown, BuffSize=2048kB, MaxMultSect=16, MultSect=?16?
CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=78165360
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 udma0 udma1 *udma2 udma3 udma4 udma5


--
= mailto:astavitsky@yahoo.com
=== http://www.geocities.com/astavitsky
===== GPG Key 0xF7343C8B: 68DD 1E1B 2C98 D336 E31F C87B 91B9 5244 F734 3C8B
|_____Alexander Stavitsky
#include <stdio.h>
#include <fcntl.h>
//#include <linux/ide.h>
#include <linux/hdreg.h>

#define SEAGATE_REPORT_FULL_CAPACITY 0xF1

int
get_identity(int fd) {
unsigned char args[4+512] = {WIN_IDENTIFY,0,0,1,};
struct hd_driveid *id = (struct hd_driveid *)&args[4];

if (ioctl(fd, HDIO_DRIVE_CMD, &args)) {
perror("HDIO_DRIVE_CMD");
fprintf(stderr,
"WIN_IDENTIFY failed - trying WIN_PIDENTIFY\n");
args[0] = WIN_PIDENTIFY;
if (ioctl(fd, HDIO_DRIVE_CMD, &args)) {
perror("HDIO_DRIVE_CMD");
fprintf(stderr,
"WIN_PIDENTIFY also failed - giving up\n");
exit(1);
}
}

printf("id->command_set_1: 0x%X\n", id->command_set_1);
printf("id->lba_capacity: %lu\n", id->lba_capacity);
}

/*
* result: in LBA mode precisely what is expected
* in CHS mode the correct H and S, and C mod 65536.
*/

int
set_feature(int fd) {
unsigned char args[4] = {WIN_SETFEATURES,0,0xf1,0};
int i;

if (ioctl(fd, HDIO_DRIVE_CMD, &args)) {
perror("HDIO_DRIVE_CMD failed WIN_SETFEATURES");
for (i=0; i<4; i++)
printf("%d = 0x%X\n", args[i], args[i]);
exit(1);
}

return 0;
}

main(int argc, char **argv){
int fd, c;

char *device = NULL; /* e.g. "/dev/hda" */
int slave = 0;

device = argv[1];
if (!device) {
fprintf(stderr, "no device specified - "
"use e.g. \"seagate /dev/hdb\"\n");
exit(1);
}
printf("Using device %s\n", device);

fd = open(device, O_RDONLY);
if (fd == -1) {
perror("open");
exit(1);
}
printf("Sending Set Features F1 subcommand\n");
set_feature(fd);
printf("Done.\n");

return 0;
}
[unhandled content-type:application/pgp-signature]
\
 
 \ /
  Last update: 2005-03-22 12:52    [W:0.034 / U:0.652 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site