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SEMA ELECTRONICS CO.,LTD
FLOPPY DISK DRIVE SPECIFICATION
PAG E 7
MODEL
SFD-321B
2.3 Reliability
<No te>
( *1) A soft (re coverable) error is de fined as a successful attempt to read a track
of data within 3 retries after a read failure.
A rea d retry is defined as an a ttempt to read the entire track that a read
failure occurred on .
(*2) A hard (non-recoverable) error is defined as a failure to read a track of
data wi thin 3 retries after a read failure.
( *3) A seek (access) error is d efined as the inability of the drive to seek to
a targeted track within 1 retry. An access retry is defined as one recalibration
with an attempt to seek to the targeted track.
ITEM SPECIFICATION
M.T.B.F.(Mean time between failures)
20000 power on hours (POH)
(25% duty)
M.T.T.R.(Meantimetorepair) 30 minutes Max.
Compo nent Life 5years
Disk Life 3
×
10
6
passes per track or more
Disk Inse rtio n 3
×
10
4
times or more
Error Rate
Soft Read Error
(*1)
1per10
9
bits read
Hard Read Error
(*2)
1per10
12
bits read
Seek Error
(*3)
1per10
6
seeks