Perstor Systems, Inc
ÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉ
ÉÉÉ ÉÉÉ
ÉÉÉ ÚÄÄÄ¿ ÚÄÄÄ¿ ÚÄÂÄ¿ ÚÄÄÄ¿ Â Â ÚÄ¿ Â ÚÄÄÄ¿ ÚÄÂÄ¿ ÉÉÉ
ÉÉÉ ³ ³ ³ ³ Á ³ ÃÄÄÄÙ ³ ³ þþþ ³ ³ ³ ÃÄ ³ ÉÉÉ
ÉÉÉ ÀÄÄÄÙ ÀÄÄÄÙ Á Á Á ÀÄÄÄÙ Á ÀÄÙ ÀÄÄÄÙ Á ÉÉÉ
ÉÉÉ ÉÉÉ
ÉÉÉ ÚÄÄ¿ ¿ ÚÄÄ¿ ÚÄÄ¿ ÚÄÄ¿ Ú ¿ Â Â Â Â ÚÄÄ¿ ÉÉÉ
ÉÉÉ ÚÄÄÙ ³ Ä´ Ä Ä´ ³ ³ ÃÄÄ¿ Ä ³ ÀÄÄÅ ÀÄÄÅ ³ ÉÉÉ
ÉÉÉ ÀÄÄÙ Á ÀÄÄÙ ÀÄÄÙ ÀÄÄÙ ÀÄÄÙ Á Á Á Á ÉÉÉ
ÉÉÉ ÉÉÉ
ÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉ
Compliments of
The P e r S t o r S u p p o r t B o a r d
FidoNet 1:102/523
AlterNet 7:401/523
Perstor Systems, Inc. is an emerging leader in the
development and marketing of high technology information storage
controllers. Using its proprietary Advanced Data Recording
Technology (ADRT) Perstor has developed a controller line that
gives ESDI performance and capacity to ST506/412 Winchester hard
disk drives. Five models are currently manufactured and marketed
in this product line: PS180-8XT, PS180-8AT, PS180-16F, PS180-
16FHP, and PS200-16F.
The most unique feature of the Perstor Controllers is that
they increase disk capacity by 90% to 100%. Upgrading a current
system is often a better alternative to purchasing a brand new
system; many personal computer users want to make the most of
their existing equipment. A Perstor Controller enables the end-
user to add storage capacity to his or her hard disk rather than
buying a new one. It also allows the distributor to increase the
capacity of a low cost hard disk and sell it as a more
attractive, cost effective sub-system.
The PS180 models are intended for use with ST506/412
Winchester disk drives of any form factor having oxide or plated
media. The PS200 model is recommended for plated or thin film
media drives having high performance, RLL approved internal
circuitry. All models also increase system speed by 10 - 100%
The 16F models include support for floppy disk drives of
many capacities and form factors. Customers using these boards
save slot space in the computer because one controller handles
two hard disks and two floppies. More room is left for graphics
cards, fax cards, and other peripheral boards.
ADRT consists of proprietary encoding, signal processing,
and extended error checking and correction techniques based on
the IBM 4300 and CD ROM technology. This unique combination
increases hard disk capacity and performance, decreasing errors
at the same time.
Much confusion exists in the industry about different
controller technologies and their features. Following is an
outline of basic differences between MFM, RLL, and ADRT
controllers:
MFM RLL ADRT (180)
Sectors per Track 17 26 31
Capacity Increase* 0% 50% 90%
Data Transfer Rate 5mbits 7.5mbits 9mbits
Data Write Rate 5mbits 7.5mbits 2.2 - 5.5
Compatible Drives MFM RLL MFM & RLL
Error Correction 32 bit 32 bit 56 bit
* in MFM format
Standard RLL controllers run at 7.5 megabits per second in
all phases of operation, and this data rate tends to overstress
disk drive media and cause data loss in drives specified for a 5
megabit data rate. In addition, the 32 bit ECC is not as
effective as a 56 bit ECC at correcting any resulting errors.
While the effective data transfer rates achieved with ADRT
range from 9 to 10 megabits per second, the rate of flux changes
per second induced on the media surface remains within the
specified window margins of MFM disk drives. These controllers
also employ a larger error checking and correction code, allowing
them to be used effectively and reliably with MFM drives.
What does all of this technical jargon mean to you? Simply
that the Perstor ADRT Controllers increase capacity, performance,
and reliability on a wide range of new and used hard disk drives.
Comments
Post a Comment