Hardware Summary

Characteristics of Some (more-or-less) Current Devices

Device: Manufacturer and model	Typical Costs [2001 - US$] Drive / Unit	Capacity	Transfer Rate {sustained vs. burst} (bytes/ sec)	Average seek time [ms]	Track to Track Seek [ms]	Latency [ms]	Rotation Speed [rpm]	On-Board Cache	Applications/ Uses/Comments
HD: Seagate Cheetah	$400.00	18 / 37 GB	47.4 MB/sec (100+ burst) 2GB:fibre channel	3.9	0.8	2.0	15000	4MB	- data warehousing - servers - digital AV - vision / image processing - supercomputers - claims to be the fastest
HD: High Capacity	$1000-2500	73.4-181.6 GB	33MB	5.8-7.4	.6-.9	2.99ms	7200-10,000	16MB
HD: Typical Mainstream	$300-500	9 / 18 / 36 GB	33MB	5.2-7.4	0.8	3.0 ms	7200-10,000 rpm	16MB	- general purpose - servers, mainframes, etc.
HD: Personal (PC)	$150-200	10-40 GB	30MB	8-10	1-2	~4 ms	5400-7200	2MB
RAID	$5,000 - $30,000	up to 40 TB	30 - 60 MB	5 - 7		2.99	7200 - 10000	2GB - 32GB	- performance - fault tolerance
Typical Floppy	Drive: Disk: $1-2	1.44 MB	54 K	170-200			360		- cheap, common - small, simple - start/stop time 3 sec. also has head-settle time - legacy applications
ZIP	$100-200 $10-20/ disk	100 or 250 MB	2.4 MB (some less)	29		10	~3K		- relatively inexpensive - larger capacity than floppy - start/stop = 3-8 sec
JAZ	$275+ $100 / Disk	1-2 GB	1.4 MB	29		10			- big enough for back-up
Super Disk (Imation)		125 MB						Floppy Replacement	- compatible with floppy - colour coordinated with iMac - IMATION NO LONGER SELLS IT
LS-120 [laser-servo] (Compaq, Matsishuma)	$45	120 MB	10.88 MBits/Sec	86	10		1440	Floppy Replacement	2490 tracks/in. magnetic w/ optical tracks to align heads
HiFD (Sony)		200 MB						Floppy Replacement
Click! Disk aka PocketZip (Iomega)		40 MB						Hand-Held Devices
(SyQuest) SparQ, SyJet	Drive: $250/$400 Disk: $60/$150	1GB, 1.5GB						Removable Cartridge
Flash Memory	$100+	64MB							- popular for hand-held devices
DataPlay [Imation]	Disk: $5	500MB	~ 1 MB						- size of a quarter
MO		650 MB	< 1 MB	< 25					- long life
PD		650 MB		>100
CD-ROM		650 MB	150 KB	50
CD-ROM (56X)	$80 cdn	650 MB	8.6 MB	50
CD-RW (16X10X40)	$600 cdn	650 MB		160				8 MB
DVD (16X)	$150 cdn	1 side; 1 layer: 4.7GB 1 side; 2 layer: 8.5GB 2 side; 1 layer: 9.4GB 2 side; 2 layer: 17GB	4.69 MB	95				512 KB	- much higher capacity than - CD2 sided
DVD-RAM		2.6 / 5.2 GB							- double sided comes in cartridge
Open Reel Tape		~ 200 MB	1 MB/s						9 tracks
DAT		20 GB							older technology
QIC		1 - 8 GB	.5 MB/s	120"/sec					- helical scan - high density
DLT		35 GB	5 GB/sec						128 tracks - long life
Pereos
AIT ( Advanced Intelligent Tape) MAXELL		25 GB	3 MB/s					in cartridge memory 16K	- film editing - video server - data acquisition - backup