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: linux-kernel@vger.kernel.org >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/
