I have a working LVM XFS system using 4 disk of 3TB each, I grow LVM adding 4 more disk and grow XDS filesystem, all appears to be good so I copy some file by SMB, and suddenly speed decreased to 1/2 of normal speed, and I notice this errors on the log:
My system info is:
Is really an error?
How to check?
I understand that first need to umount, but how to do from shell?
any help is apreciated.
PD: My pool are a backup so I can start from scratch if necessary, but I want to teach all I want from this experience, so one question more:
How to prepare disk prior to add?, I simply earase info and add to LVM, but this message appears in log:
Code
fdisk -l
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WARNING: GPT (GUID Partition Table) detected on '/dev/sda'! The util fdisk doesn't support GPT. Use GNU Parted.
WARNING: GPT (GUID Partition Table) detected on '/dev/sdb'! The util fdisk doesn't support GPT. Use GNU Parted.
Disk /dev/sdg doesn't contain a valid partition table
Disk /dev/sdf doesn't contain a valid partition table
Disk /dev/sdi doesn't contain a valid partition table
Disk /dev/sdh doesn't contain a valid partition table
Disk /dev/sdk doesn't contain a valid partition table
Disk /dev/sdl doesn't contain a valid partition table
Disk /dev/sdm doesn't contain a valid partition table
WARNING: GPT (GUID Partition Table) detected on '/dev/sdj'! The util fdisk doesn't support GPT. Use GNU Parted.
Disk /dev/sdj doesn't contain a valid partition table
Disk /dev/dm-0 doesn't contain a valid partition table
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What I need to do next time ?, Perhaps fdisk first or create a Label?.