9:01 PM Mintrukpare
Quantum Super DLT (SDLT) Data Tape Drives

Quantum is well known for the backward compatibility of their backup data tape storage products. This powerful feature of Quantum data storage products facilitates its users to mix the new data cartridges with the older ones in archive situation to make possible the transfer in ordered format. The movement of the video production (magnetic analog system of videotape) to the quantum SDLT-600A tape drives with tape cartridges (SDLT-IIA) offers an archive solution that is cost effective and is proven reliable.

The "DLT-exchange" technology helps the content creators and the broadcasters to work with the stored content on Super-DLT IIA as data files that are universally accessible because of the MXF Meta data. The archive system of SDLT-600A provides cost benefits per Gigabyte of data storage capacity as compared to the analog videotape. SDLT-600A also provides OS access and multiple platforms to data utilizing the MXF Meta data. This powerful feature of Quantum data storage products facilitates its users to mix the new data cartridges with the older ones in archive situation to make possible the transfer in ordered format.

SDLT-600A can be used in the automation environments and it allows the usage of digital tape content and ready access in recovery from disaster situations. In environment of network storage, the Quantum SDLT-600A can be utilized as storage hierarchy's part. The data rate and the storage capacity of the Quantum SDLT family will continuously support archival access & storage quicker than "real time" so as to accommodate the developing industry's demanding environment.

The Super-DLT drives from Quantum offer affordable data backup solution for the mainframes, servers (mid sized) and high end workstations. SDLT 600 is considered as one of the advanced and fastest tape drive. The users can archive up to 259 GB/hour (600GB per tape). It offers 20 percent quicker throughput & 50 percent more storage capacity per data cartridge than the LTO-2 ultrium tape drives in similar factor form. It also has the latest WORM technology. The users can create non-erasable and non-rewritable archive by utilizing the free "DLT-Sage" software & SDLT II cartridge thus enabling the capabilities of "DLT-Ice WORM".

There is no extra cost required by SDLT-600 for the WORM technology. It is backward compatible with the VS-1 read only tape media & SDLT-1. The second generation of the SDLT tape drive is SDLT-320 that is backward compatible with the older generations of the DLT drives. This introduction has improved the top end performance of SDLT.

Quantum SDLT-320 is best suited for the enterprises that require greater capacity and performance than that of SDLT 220 drive and also need support for the tape media of existing DLT-IV. The customers can archive up to 115 GB/hour (320 GB per tape). They provide 60 percent more capacity per cartridge when compared in similar form factor with the LTO-1 ultrium drives. It is (read only) backward compatible with DLT-IV tape media that has been written on DLT-1, VS-80, DLT-8000, DLT-4000 and DLT-2000 data tape drives. And is fully compatible (write/read) with Super-DLT 1 media that has been written on the tape drives of SDLT-220. The important thing is that the drives of Super DLT 320 utilize the tape of SDLT-1. Therefore, there is no need for the current users of SDLT to make new investment for media when they use the SDLT-320 tape drive. The SDLT-320 tape drives bridge SDLT & DLT due to the backward capability (read) with the media of DLT type-IV.
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8:59 PM Mintrukpare
DDS Backup Tape Standard

The standard of DAT (digital audio tape) was developed in 1987 and it offered digital sound of up to 3 hours on single data tape. This technology used the rotating heads (helical scan) which was same as that utilized in the VCR (video cassette recorder). DDS was based on the standard of digital audio tape and it also utilized the similar mechanism and technology. The design of the tape cartridge is similar but the tape formulations are different. The error correction of digital audio tape has 2 levels known as C-1 and C-2. On the other hand the DDS tape format has another third level of error correction C-3. This third level recovers the errors that are much severe for the digital audio tape (DAT). Error correction C-1 and C-2 perform their function at track while the third level C-3 works over track group.

The capacity has reached threshold of 20 GB in the DDS-4 backup tape format. Media of DDS4 follows familiar data tape model with increased tape length and more advanced formulation of MP-media. Output of the metal particle MP+++ formulation is also on the higher side and was designed for supporting the higher DDS-4 tape format's track densities. Need arose to formulate tape media having the ability to generate superior output signals as the track pitch was reduced. So improvements and advancements were made in several areas of DDS4 data tape media besides its MP formulation as its media thickness was also lowered to 5.9µm. This made possible to increase the length of the DDS-4 tape reel to 150m from its previous tape length of 125m.

The tape of DDS4 was made thinner but it was essential that the rigidity and strength of the tape should be same as that of its previous DDS tape media had. Its durability was also increased so that it could tolerate the higher speed of the rotational drums that are essential for the increased data speed. The conflicting needs were resolved by the back coating the tape media layers and by enhancements in base film. The base film was made smoother for resolving issues of signal dropout and noise modulation in helical scan as its speeds of head to tape is very high. Its base film is also very tough and therefore it can bear the high speed editing & searching.

Modulation noise is reduced and the ratio of signal to noise is also enhanced in the base film of DDS-4 backup tape format. Tough base film of DDS-4 limits the contraction and expansion of the data tape in extreme temperatures (both very low and high). Smooth tape surface and back coating lowers the noise, maximizes the efficiency and achieves higher friction coefficient. Back-coating of DDS4 data media is specifically designed for helping the DDS data tape in achieving ideal friction that perfectly fulfills the conditions with DDS data tape drive. Back coating of DDS-4 media is very conductive in nature and it protects the tape from the errors, dropouts and prevents electric charges from attracting dust.

DAT-72 tape media is based on the foundation technology of previous media format of DDS for achieving 36 GB native recording capacity. Metal particle formulation (MP++++) is used in the DAT72 tape media. The recording capacity of DAT-72 tape format is almost 80 percent more than the DDS4 technology because of the advancements in four major areas. These areas of advancements are the increased 170m tape length, increased density of tracks, advancement in the recording density and increasing it to 162 KBpi from 122 KBpi, and higher transitioning of MP formulation's output.
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