|
|
 |
« on: June 08, 2009, 12:04:27 AM » |
|
Hello All,
I'm developing a disk utility for SSD which connected to sata port.
It detects and mounts my SSD well on kernel 2.6.22.18.
Also IDE reset at UBoot get correct identify information.
But once I want to access sata port by my program through /dev/sdb with SG_IO interface.
I get SG_IO error: SCSI sense =0x5/20/00, ATA =0x00/00
But it works well on my x86 fedora 7.
Didn't SG_IO is supported just enable SCSI GENERIC in Kernel?
Any suggestion will be appreciated.
Here is sample identify C code.
unsigned char cdb[ATA_16_LEN]
= { ATA_16, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
unsigned char sense[32];
unsigned int nsects = 1;
struct sg_io_hdr hdr;
cdb[ 1] = ATA_PROTO_PIO_IN;
cdb[ 6] = nsects;
cdb[14] = 0xEC;
memset(&hdr, 0, sizeof(struct sg_io_hdr));
hdr.interface_id = 'S';
hdr.cmd_len = ATA_16_LEN;
hdr.mx_sb_len = sizeof(sense);
hdr.dxfer_direction = SG_DXFER_FROM_DEV;
hdr.dxfer_len = nsects * ATA_SECT_SIZE;
hdr.dxferp = buf;
hdr.cmdp = cdb;
hdr.sbp = sense;
hdr.timeout = 5000; /* milliseconds */
memset(sense, 0, sizeof(sense));
if (ioctl(fd, SG_IO, &hdr) < 0) {
perror("ioctl(SG_IO)");
return (-1);
}
if (hdr.status == 0 && hdr.host_status == 0 && hdr.driver_status == 0)
return 0; /* success */
if (hdr.status > 0) {
unsigned char *d = sense + 8;
/* SCSI status is non-zero */
fprintf(stderr, "SG_IO error: SCSI sense=0x%x/%02x/%02x, ATA=0x%02x/%02x\n",
sense[1] & 0xf, sense[2], sense[3], d[13], d[3]);
return -1;
}
|
