[cgl_discussion] Questions about the usage model of Block device
forrest.zhao at intel.com
Wed Mar 23 21:49:05 PST 2005
The requirement of Block Device Removal is described as follows:
The Linux kernel should allow removal of a block device while it is in
use without degrading reliability of the system. The block device shall
be removable even if in use by an open file (fdisk /dev/sda), a raid
volume, or a filesystem or multiples thereof.
The first question is: Does this requirement include "surprise removal"?
That is, when the block device is surprise-removed, we should guarantee
the reliability of system.
My second question is: what's the purpose of removing a block device in
use? Or who would remove a block device in use for what purpose? If it's
for displacement, then the new disk will not contain the data on the
original disk; if it's for maintenance, the removed disk will be back at
a later time. Right?
May I know a practical usage case of block device removal from telecom
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