Hi,
I don't know really which subsystem this, so I'm sending this to the
linux-ide list.
Please direct me to a more appropriate place if this is not correct.
I'm using a 3ware 9500 with Linux 2.6.18.1. I've grown the HW
raid5-array and here is where the problem begins. After the card had
expanded the array, I used "blockdev --rereadpt /dev/sdn" to get the
kernel to recognize the now larger device. The last step was to do a
"pvresize /dev/sdn". The problem is that pvresize still thought that the
device was at the original size.
From the lvm mailinglist I found out that pvresize used the same
mechanism as "blockdev" (ioctl BLKGETSIZE64) to get the size of the
disks, so I tested this and found that blockdev also reported the device
to have the wrong size.
So, if I do:
# cat /sys/block/sdn/size
5859250176
and
# blockdev --getsize64 /dev/sdn
2499946741760
# blockdev --getss /dev/sdn
512
# expr 2499946741760 / 512
4882708480
Apparently /sys/block/sdk/size is updated with the new size, but
whatever "ioctl BLKGETSIZE64" is querying is not. If I reboot,
everything works correctly.
Shouldn't it be possible to extend the size of a disk without rebooting?
Best Regards,
/LM
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