i'm not sure if this is the right place to ask
when executing backup of the windows server with Windows backup utility, at the specify destination type screen, there is a note under backup to volume option, this one :
Choose this option if you cannot dedicate an entire disk for backups. Note that the performance of the volume may be reduced by up to 200 percent while it is used to store backups. we recommend that you do not store other server data on the same volume.
i took a screenshot you can find it here
My question is how the performance can be reduced by more than 100 percent ? if the I/O performance measurement is 60MB/s for example, will it be -60MB/s if reduced by 200 percent ?