Bullshit. Each disk added to RAID0/RAID1 speeds up writes. For RAID5 it may not be the case because each additional disk increases number of operations to recalculate the parity.
Think again. RAID5 is _much_ slower then RAID1 on writes because it must recompute parity info on each write which requires several additional read and write operations. In some cases its read performance may be much slower then RAID1. For example many small files, opening file requires modification of its access time which is a write operation. You can observer this behaviour with INN or sendmail with large number of users.
RAID1 is actually faster then RAID0 or RAID5 for reads because it has twice the number of disks and with proper implementation _all_ disks are used to fetch data.
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Bullshit. Each disk added to RAID0/RAID1 speeds
up writes. For RAID5 it may not be the case
because each additional disk increases number
of operations to recalculate the parity.
Think again. RAID5 is _much_ slower then
RAID1 on writes because it must recompute parity info on each write which requires several additional read and write operations. In some cases its read performance may be much slower then RAID1. For example many small files, opening file
requires modification of its access time which is a write operation. You can observer this behaviour
with INN or sendmail with large number of users.
RAID1 is actually faster then RAID0 or RAID5 for reads because it has twice the number of disks and with proper implementation _all_ disks are used to
fetch data.