sata hard disk is showing hd device

bharatlalgupta · 03-16-2009, 07:17 AM

hi
i use RHEL5.0,
i'm using sata hdd on my pc, but when i execute this following command.
#fdisk -l
my hdd address is /dev/hda{1,2,3,4,5}
how this is possible that my hard disk is sata but showing hd device..
i read in one linux book that
only ide device show as hd device.
sata,scsi,usb device show as sd device ..
so plz,
post your advice for this topic..

sorry, for my bad english...

GlennsPref · 03-16-2009, 07:36 AM

Hi, I have two sata disks, the output of fdisk -l is...

Code:

[root@GamesBox bin]# fdisk -l

Disk /dev/sda: 250.0 GB, 250059350016 bytes
255 heads, 63 sectors/track, 30401 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0xdff1dff1

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1        2805    22531131    7  HPFS/NTFS
/dev/sda2            2806       30401   221664870    f  W95 Ext'd (LBA)
/dev/sda5            2806        2876      570276   83  Linux
/dev/sda6            2877        3782     7277413+  83  Linux
/dev/sda7            3783        7391    28989261   83  Linux
/dev/sda8            7392        9981    20804143+  83  Linux
/dev/sda9            9982       12592    20972826   83  Linux
/dev/sda10          12593       13101     4088511   83  Linux
/dev/sda11          13102       15667    20611363+   c  W95 FAT32 (LBA)
/dev/sda12          15668       17740    16651341   83  Linux
/dev/sda13          17741       23471    46034226   83  Linux
/dev/sda14          23472       24747    10249438+  83  Linux
/dev/sda15          24748       30401    45415723+  83  Linux

Disk /dev/sdb: 160.0 GB, 160041885696 bytes
255 heads, 63 sectors/track, 19457 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x2ecb425f

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1   *         510       19457   152199810    f  W95 Ext'd (LBA)
/dev/sdb2               1         509     4088511   82  Linux swap / Solaris
/dev/sdb5             510        1528     8185086   83  Linux
/dev/sdb6            1529        5426    31310653+  83  Linux
/dev/sdb7            5427        7344    15406303+  83  Linux
/dev/sdb8            7345        9915    20651526    c  W95 FAT32 (LBA)
/dev/sdb9            9916       11672    14113071    c  W95 FAT32 (LBA)
/dev/sdb10          11673       18083    51496326   83  Linux
/dev/sdb11          18084       18772     5534361   83  Linux
/dev/sdb12          18773       19457     5502231   83  Linux

Partition table entries are not in disk order
[root@GamesBox bin]#

Is your bios set to use ahci or sata for the hd's?

I use ahci for both windows and GNU/Linux.

What kernel version do you run? type uname -a for the result...

Code:

[root@GamesBox bin]# uname -a
Linux GamesBox.GlennsPref.net 2.6.28-Preempt-0.rc8.1mnb #1 SMP PREEMPT Wed Mar 11 14:23:21 EST 2009 x86_64 AMD Athlon(tm) 64 X2Dual Core Processor 5600+ GNU/Linux

Hope that helps.

btw, LQ has a fantastic search function that may save you time waiting for an answer, or double posting your questions.

Cheers, Glenn

jschiwal · 03-16-2009, 07:56 AM

What are your kernel boot options? Which kernel version do you use? As of late, even ide drives show up as a scsi device.

There may be a BIOS option to present SATA drives as IDE drives.

lazlow · 03-16-2009, 02:06 PM

RHEL/Cento5.x still uses the hdX designations for pata and the sdX designations for sata(normally). It will do so throughout its life cycle(assuming no customizations). RHEL6.X may make the switch to straight sdX designations for all, if the transfer speed bugs (among others) can be worked out.

GlennsPref is most likely on the right track. You probably have the bios set to emulate pata.

anaspk · 03-17-2009, 01:15 AM

Quote:

Originally Posted by bharatlalgupta

hi
i use RHEL5.0,
i'm using sata hdd on my pc, but when i execute this following command.
#fdisk -l
my hdd address is /dev/hda{1,2,3,4,5}
how this is possible that my hard disk is sata but showing hd device..
i read in one linux book that
only ide device show as hd device.
sata,scsi,usb device show as sd device ..
so plz,
post your advice for this topic..

sorry, for my bad english...

This problem is specific to the ahci driver, the driver was not initializing
all the dma buffers properly in ahci_port_start, would you please verify the
kernel-2.6.18-104.el5.RHEL5.3.sata and let me know as soon as possible. Thanks.

bharatlalgupta · 03-17-2009, 01:40 AM

my linux kernel version is kernel-2.6.18-8.el5
thanks for reply