2.4 IDE hotplug disk change and size change problem

From: Alan Cox (alan_at_redhat.com)
Date: 12/24/03

  • Next message: grundig_at_teleline.es: "Re: DEVFS is very good compared to UDEV" 
    Date:	Tue, 23 Dec 2003 18:01:20 -0500
To: linux-kernel@vger.kernel.org

    Some people found that the

            hdparm -b0
            swap disk for a larger one
            hdparm -b1

    would then go nuts with disks IFF the new disk was larger and fdisk wasnt run.

    Can folks seeing this try the following guess at the problem (I dont currently
    have any hotpluggable IDE working except CD/DVD bays)

    --- ide.c~ 2003-12-23 22:45:50.000000000 +0000
    +++ ide.c 2003-12-23 22:51:26.000000000 +0000
    @@ -826,7 +826,11 @@
             for (unit = 0; unit < MAX_DRIVES; ++unit) {
                     ide_drive_t *drive = &hwif->drives[unit];
                     if(drive->present && !drive->dead)
    + {
    + drive->revalidate = 1;
                             ide_attach_drive(drive);
    + ide_revalidate_disk(MKDEV(hwif->major, unit<<PARTN_BITS));
    + }
             }
             our_drive->usage++;
             return 0;

    -
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