Dear Corbet,
After loading my module that is partitioned supported & having defined a
single FAT partition with
#mkfs -tvfat /dev/tfa0
sfdisk show the disk info as follows.
# sfdisk -l /dev/taf0
Disk /dev/tfa0: 448 cylinders, 2 heads, 32 sectors/track
Units = cylinders of 32768 bytes, blocks of 1024 bytes, counting from 0
Device Boot Start End #cyls #blocks Id System
/dev/tfa0p1 0 - 0 0 0 Empty
/dev/tfa0p2 0 - 0 0 0 Empty
/dev/tfa0p3 0 - 0 0 0 Empty
/dev/tfa0p4 0 - 0 0 0 Empty
Dear Corbet,
Here are the details u might be interested in.
I have explained my physical node creation logic below.
#Cat/proc/partitions
major minor #blocks name
3 0 78184008 hda
3 1 6144831 hda1
3 2 10241437 hda2
3 3 1285200 hda3
3 4 1 hda4
3 5 10241406 hda5
252 0 14336 tfa0
Can you just please explain me what can infer from the cat
/proc/partitions?
Do we expect all the 4 partitions to be show here?
My node creation method is simple
Kern code
---------
gDisk->gd = alloc_disk(4); /* 3 -> 3 partitions */
gDisk->gd->first_minor = (iSock * 4);
i.e. iSock = device no [0-3] ( 4 devices)
Physical nodes design
---------------------
To support partitions on device 0
---------------------------------
mknod /dev/tfa0 b 252 0
mknod /dev/tfa1 b 252 1
mknod /dev/tfa2 b 252 2
mknod /dev/tfa3 b 252 3
To support partitions on device 1
---------------------------------
mknod /dev/tfa4 b 252 4
mknod /dev/tfa5 b 252 5
mknod /dev/tfa6 b 252 6
mknod /dev/tfa7 b 252 7
To support partitions on device 2
---------------------------------
mknod /dev/tfa8 b 252 8
mknod /dev/tfa9 b 252 9
mknod /dev/tfa10 b 252 10
mknod /dev/tfa11 b 252 11
To support partitions on device 3
---------------------------------
mknod /dev/tfa12 b 252 12
mknod /dev/tfa13 b 252 13
mknod /dev/tfa14 b 252 14
mknod /dev/tfa15 b 252 15
Thanks & Regards,
Mukund Jampala
>-----Original Message-----
>From: [email protected] [mailto:[email protected]]
>Sent: Thursday, August 04, 2005 8:09 PM
>To: Mukund JB.
>Cc: [email protected]
>Subject: Re: 2.6 partition support driver methods
>
>Mukund JB. <[email protected]> wrote:
>
>> BUT, when a card is inserted in the socket 3, I am NOT able to mount
and
>> it says.
>> Mount: /dev/tfa12 is not a valid block device
>>
>> Can you convey me where exactly I am missing or why is it failing?
>
>First step would be to look in /proc/partitions (and the system
logfile)
>to get an idea of what the kernel thinks is there. When you call
>add_disk(), the kernel should emit some messages noting the partitions
>that it sees. My guess is a mismatch of minor numbers between your
>device nodes and what the kernel sees (it's hard for me to make
complete
>sense out of your minor number logic), but I could be wrong.
>
>jon
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
| |
 |