UPGRADING REPAIRING PCs
UPGRADING REPAIRING PCs UPGRADING REPAIRING PCs
158 Chapter 5—Floppy, Removable, Tape, and Flash Storage Table 5.11 QIC-EX Tape Media Capacity/ Verbatim Capacity/ Original Tape Compressed 2:1 QIC-Extra Compressed 2:1 QIC-801 normal length (DC-2120) 125MB/250MB DC2120EX 400MB/800MB QIC-80 longer length (DC-2120XL) 170MB/340MB DC2120EX 400MB/800MB QW5122 210MB/420MB DC2120EX 400MB/800MB Travan 1 (TR-1) 400MB/800MB DC2120EX 400MB/800MB Travan 1 (TR-1) 400MB/800MB TR-1EX 500MB/1.0GB QIC-30202 680MB/1.36GB MC3020EX 1.6GB/3.2GB QW-3020 850MB/1.7GB MC3020EX 1.6GB/3.2GB Travan 3 (TR-3) 1.6GB/3.2GB MC3020EX 1.6GB/3.2GB QIC-30202 680MB/1.36GB TR-3EX 2.2GB/4.4GB Travan 3 (TR-3) 1. Also known as “Ximat” 2. Also known as “Taumat” 1.6GB/3.2GB TR-3EX 2.2GB/4.4GB General guidelines only are shown in the previous table. Check with the drive and backup software vendor to verify compatibility and maximum capacity with your drive. A more detailed crossreference listing of many popular drive models is available online at www.ceservice.com/crossrefverbatim.htm. OnStream ADR Tape Drives and Media OnStream ADR drives offer both standard drive-backup features and the capability to treat the cartridge as a drive letter for faster access to data. Since their introduction in 1998, these have become very popular for new installations. Unlike Travan drives, though, they do not work with any media other than their own ADR cartridges. Table 5.12 OnStream ADR Family Specifications Drive Model Interface Performance Retail Media Used DI30 IDE ATAPI 1–2MB/sec $299 ADR 30GB DP30 Parallel .7–1.4MB/sec $399 ADR 30GB USB30 USB .85–1.7MB/sec $399 ADR 30GB SC30 SCSI internal 2–4MB/sec $499 ADR 30GB SC30 SCSI external 2–4MB/sec $599 ADR 30GB FW30 IEEE-1394 (FireWire) 2–4MB/sec $599 ADR 30GB SC50 SCSI internal 2–4MB/sec $699 ADR 50GB or 30GB ADR50 Int LVD SCSI internal 4–8MB/sec $799 ADR 50GB or 30GB ADR50 Ext LVD SCSI external 4–8MB/sec $949 ADR 50GB or 30GB
Tape Backup Drives and Media 159 Choosing the Best High-Performance Backup Technology Beyond Travan and ADR, several other high-performance backup technologies exist. All these technologies are available in various SCSI interface versions and can be purchased as internal or external drives. However, these drives are much more expensive than Travan or OnStream ADR drives. Additionally, they are more likely to be used as network tape backups than as individual PC backups, although current 20GB or larger EIDE hard drives are large enough to justify use of these drives for backup. Unlike the confusing backward-compatibility picture for QICfamily drives, the more advanced drives in each family are backward compatible with smaller drives. Table 5.13 summarizes the performance and other characteristics of these tape technologies and compares them to Travan 8GB, 20GB, and OnStream ADR. The prices of the tape drives vary tremendously depending on which version of SCSI is selected, whether the drive is internal or external, and whether a single-tape or tape library drive is selected. The approximate price range listed is for internal and external, single-cartridge tape drives. The following standards are listed in order by native capacity. All drive interfaces are SCSI except as noted. Table 5.13 High-Performance Tape Backup Standards Compared Backup Speed Capacity/2:1 (Native/ Drive Price Media Drive Type Compressed Compressed) Range Cost DAT DDS-2 4GB/8GB .5–1.1MB/sec $500–$800 $9–$13 Travan 8GB and NS8 4GB/8GB .6–1.2MB/sec $200–$380 $32–$38 Exabyte 8mm (Eliant 820) 7GB/14GB 1–2MB/sec $1200 $10 Travan 20GB and NS20 10GB/20GB 1–2MB/sec $340–$470 $35–$42 DAT DDS-3 12GB/24GB 1.1–2.2MB/sec $700–$1000 $18–$23 Exabyte 8mm (Mammoth-LT) 14GB/28GB 2–4MB/sec $1200–$1500 $40 ADR 30GB 15GB/30GB 1–2MB/sec IDE 2–4MB/sec SCSI $299–$599 $40 DAT DDS-4 20GB/40GB 2–4.8MB/sec $1000–$1500 $35–$40 Exabyte 8mm (Mammoth) 20GB/40GB 3–6MB/sec $2200–$3000 $65–$70 AIT-1 25GB/50GB or 35GB/70GB 3–6MB/sec $1500–$2000 $75–$100
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Tape Backup Drives and Media 159<br />
Choosing the Best High-Performance Backup<br />
Technology<br />
Beyond Travan and ADR, several other high-performance backup<br />
technologies exist. All these technologies are available in various<br />
SCSI interface versions and can be purchased as internal or external<br />
drives. However, these drives are much more expensive than<br />
Travan or OnStream ADR drives. Additionally, they are more likely<br />
to be used as network tape backups than as individual PC backups,<br />
although current 20GB or larger EIDE hard drives are large enough<br />
to justify use of these drives for backup.<br />
Unlike the confusing backward-compatibility picture for QICfamily<br />
drives, the more advanced drives in each family are backward<br />
compatible with smaller drives.<br />
Table 5.13 summarizes the performance and other characteristics of<br />
these tape technologies and compares them to Travan 8GB, 20GB,<br />
and OnStream ADR. The prices of the tape drives vary tremendously<br />
depending on which version of SCSI is selected, whether the<br />
drive is internal or external, and whether a single-tape or tape<br />
library drive is selected. The approximate price range listed is for<br />
internal and external, single-cartridge tape drives.<br />
The following standards are listed in order by native capacity. All<br />
drive interfaces are SCSI except as noted.<br />
Table 5.13 High-Performance Tape Backup Standards Compared<br />
Backup Speed<br />
Capacity/2:1 (Native/ Drive Price Media<br />
Drive Type Compressed Compressed) Range Cost<br />
DAT DDS-2 4GB/8GB .5–1.1MB/sec $500–$800 $9–$13<br />
Travan 8GB<br />
and NS8<br />
4GB/8GB .6–1.2MB/sec $200–$380 $32–$38<br />
Exabyte 8mm<br />
(Eliant 820)<br />
7GB/14GB 1–2MB/sec $1200 $10<br />
Travan 20GB<br />
and NS20<br />
10GB/20GB 1–2MB/sec $340–$470 $35–$42<br />
DAT DDS-3 12GB/24GB 1.1–2.2MB/sec $700–$1000 $18–$23<br />
Exabyte 8mm<br />
(Mammoth-LT)<br />
14GB/28GB 2–4MB/sec $1200–$1500 $40<br />
ADR 30GB 15GB/30GB 1–2MB/sec IDE<br />
2–4MB/sec SCSI<br />
$299–$599 $40<br />
DAT DDS-4 20GB/40GB 2–4.8MB/sec $1000–$1500 $35–$40<br />
Exabyte 8mm<br />
(Mammoth)<br />
20GB/40GB 3–6MB/sec $2200–$3000 $65–$70<br />
AIT-1 25GB/50GB or<br />
35GB/70GB<br />
3–6MB/sec $1500–$2000 $75–$100
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