Re: How to reread disk size?

[Robert Hancock <hancockrwd@gmail.com>]

On 02/19/2010 05:48 PM, Asdo wrote:
> Hi all,
> I have a system with hot swappable bays but one of the involved
> controllers apparently does not support hot swap:
> (I have unfortunately an old kernel: 2.6.24)
>
> 00:1f.2 IDE interface: Intel Corporation 631xESB/632xESB/3100 Chipset
> SATA IDE Controller (rev 09) (prog-if 8f [Master SecP SecO PriP PriO])
> Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 19
> I/O ports at 18c8 [size=8]
> I/O ports at 18ac [size=4]
> I/O ports at 18c0 [size=8]
> I/O ports at 18a8 [size=4]
> I/O ports at 18b0 [size=16]
> Memory at da804400 (32-bit, non-prefetchable) [size=1K]
> Capabilities: [70] Power Management version 2
>
>
> I have swapped the disk with a larger one (750GB -> 1TB) but it blockdev
> --getsize64 still sees the old size. It has not realized I have swapped
> disk.
>
> In the past I was doing:
>
> blockdev --rereadpt /dev/sdX
>
> and it usually worked on other controllers to reread the size visible
> from "blockdev --getsize" or "blockdev --getsize64". One time I think it
> even worked on exactly *that* controller... but it's not working now,
> it's strange.
>
> Is there a technique, or I am out of luck?
> The machine should not be rebooted
> I would even enter the size manually if possible: I know how many LBA
> blocks are in that disk.

What dmesg output do you get when you do this?