can Linux detect an EVA Lun size increase ?

[Jose Luis Araujo]

Hi, We have a EVA8000 connected to a c-class enclosure with QMH2462 mezannines, we are booting from the EVA.

I create the boot lun and am able to boot the machine to SLES 10 without problems, we installed hp_qla2x00 drivers with built-in failover.

Everythin is working OK, but when i grow the lun on the EVA, i cannot see the new size on linux.

I tried both the hp_fibreutils and :
echo "scsi-qlascan" > /proc/scsi/qla2xxx/0
echo "scsi-qlascan" > /proc/scsi/qla2xxx/1
echo "- - -" > /sys/class/scsi_host/host0/scan
echo "- - -" > /sys/class/scsi_host/host1/scan

In dmesg i see the driver scanning the luns but the size of the disk does not change.
It works after a reboot, but thats not very good.

Can anyone tell me:
1- Does this work.
2- How can i do it.

Thanks

[Ivan Ferreira]

1- Does this work.

Short answer: No.

2- How can i do it.

You should use LVM. If you need more space on a logical volume, add a new lun to the volume group and extend the logical volume.

[BelaGuez]

No it doesn't. As far as I know Linux can't resize a LUN without a reboot and we've tried.

Works under Solaris though :)