Re: Rereading disk geometry without reboot

["Randy.Dunlap" <rddunlap@osdl.org>]

Jan Engelhardt wrote:
>>I am using linux kernel 2.6.9 on a san.  I have file systems on
> 
> 
> (What's a SAN?)
> 
> 
>>non-partitioned disks.  I can resize the disk on the SAN, reboot and grow
>>the XFS file system those disks.  What I would like to avoid rebooting or
>>even unmounting the filesystem if possible.
>>
>>Is there any way to get the kernel to re-read the disk geometry and change
>>the information it holds without rebooting or reloading the module (which is
>>as bad as a reboot in my case)?
> 
> 
> The `fdisk` tool will spit out an ioctl() to make the kernel reread the
> partition table (on normal computers, don't know about or what SAN). No need to
> reboot there at least.

There's 'blockdev --rereadpt' also, but neither of these work
on a mounted filesystem afaik.

-- 
~Randy