I attached a volume to an instance launched with a non-official OMI, but it is not visible. Why?
If the non-official OMI used does not support the PCI Hotplug, the attached volume is not visible. You need to add the following modules to the /etc/modules file before rebooting the instance:
For more information, see About Volumes > Volume Attachment and Device Names.
I attached a volume to an instance as /dev/xvdb, but I see a different size that the one I chose, and lost data after rebooting. Why?
This is due to a conflict with device names when restarting the instance. To prevent this, it is highly recommended to name your ephemeral disks before naming your volumes. You can also start naming your ephemeral disks from /dev/xvdb, and your volumes up from /dev/xvdz. For more information, see BSU FAQ or BSU FAQ.
What ratio should I keep between volume size and provisioned IOs?
You need to keep a ratio of 30: for 300 provisioned IOs, the size of your volume must be at least 10 GiB. For more information, see About Volumes > Volume Types and IOPS.
Is it possible to modify a volume size?
You cannot modify the size of BSU volume in hot plug. However, you can first create a snapshot of the volume, then create a bigger volume from this snapshot. For more information, see BSU FAQ.
You can also use several aggregated volumes using LVM on Linux or natively on Windows. For more information, see BSU FAQ.
How can I increase my readings/writings (IOPS)?
Standard volumes have a default average of 150 IOPS, with a punctual burst capacity up to 450 IOPS. We thus recommend using multiple aggregated volumes, or io1 type volumes instead. For more information, see BSU FAQ and BSU FAQ.
How can I avoid disk checking during reboot?
Disk checking can slow down the reboot of an instance. To avoid this, you can deactivate it using the following command in a terminal of your instance:
tune2fs -c0 -i0 /dev/sdg
This command contains the following attributes that you need to specify:
-c : max-count-mounts (must be set to 0)
-i : intervall-between-checks (must be set to 0)