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Evgenie Rudometov
www.rudometov.com
Company Seagatevypustila the next model USB 2.0 disk drives created on the basis of a 1-inch hard disk in size of 6 Gbytes
The information contents, handled and stored by means of computers, promptly increases. Thus in doubling of sizes occurs practically annually.
And the stored information is necessary for storing somewhere. Here again the processing technique of a magnetic recording realised in hard disk drives (HDD) to the aid comes. Released different form factors, these arrangements are many years champions on information capacity. Besides, they provide is unprecedented low cost of an information storage. It rushes not only to built in 3,5 and to 2,5-inch hard disks, but also to the compact transportable disk drives created on the basis of one-inch HDD.
Despite pressure of flesh-arrangements in the market of compact resources of writing, resocks and data storages, disk drives with miniature hard disks (HDD) yet have not lost the attractiveness in the opinion of potential users. It is promoted by low cost of an information storage in HDD. Besides, to popularity promote not only the attractive prices, but a number of basic features. Among which, for example, it is essential bolshee for HDD number of cycles of writing/reading in comparison with the flash-memory where real value of the given metric makes while less than 1 million cycles (in a reality much less).
Realising possibilities of magnetic processing techniques, manufacturers of disk drives release new, more and more capacious arrangements, substituting promptly becoming outdated products. As an example it is possible to result miniature shestigigabajtnyj the disk drive released by company Seagate Technology LLC (further it is simple Seagate) in exchange pjatigigabajtnoj models.
As well as the prior model, the new transportable disk drive of 1 inch with speed of rotation of a spindle of 3600 rpm is created on the basis of a miniature hard disk of a form factor . The new arrangement is hooked up by means of serial interface USB 2.0 with a transfer rate — to 480 Mbit/with.
Key parametres
Appearance shestigigabajtnoj models of disk drive USB 2.0 Pocket Hard Drive, the notebook hooked up to a compact model, is presented in a Fig. 1.
Fig. 1. Disk drive SeagateUSB 2.0 Pocket Hard Drive, hooked up to a notebook
The given arrangement, has technical name ST660211USB. The USB-cable is built in its construction with the appropriate plug. With their help hooking up of the given arrangement to USB-sockets of desktop or transportable computers is provided. The given cable, which length makes about 15 sm, is allocated in a rim of an internal disk. At rotation of the given disk counter-clockwise the cable is coiled, on hour — is unwound. In the central part of disk drive Seagate USB 2.0 Pocket Hard Drive, under a transparent, plastic window, the bright light-emitting diode, lighting up is allocated by bright, dark blue colour at call to the given arrangement.
Internally disk drive ST660211USB arrangement is presented in a Fig. 2.
Fig. 2. Internally the arrangement of disk drive SeagateUSB 2.0 Pocket Hard Drive
The interface provides the built in controller controlling an one-inch hard disk. These units are presented in a Fig. 3.
Fig. 3. Controller USB and the one-inch hard disk hooked up to it
Key parametres of disk drive ST660211USB and one-inch hard disk entering into its structure are presented in Table 1.
Table 1. Key parametres of disk drive Seagate USB 2.0 PocketHardDriveмодели ST660211USB
Size, a Gbyte |
6,0 |
Speed of rotation of disks, rpm |
3600 |
Size of the internal cache memory, Mb |
2 |
The interface |
USB 2.0, compatibility USB 1.1 |
The sizes, mm |
18,0 h 76,0 |
Power supplies |
Through USB |
Weight, g |
62,4 |
Acoustic noise, db |
22 |
Band of an operating temperature, With |
0-40 |
Operating systems |
Win XP/2000/ME, Win 98SE, |
Other parametres of 6 Gbytes ST660211USB, including and dependability, coincide with prior model 5 of Gbytes ST650211USB.
Rise of consumer properties of model 6 of Gbytes USB 2.0 Pocket Hard Drive is promoted by a set of the software delivered with it. This set coincides with a package of prior model ST650211USB. It is necessary to mark, that the new arrangement, as before, does not demand driver installation at usage widespread operational to systems.
In conclusion of the short browse of disk drive Seagate USB 2.0 Pocket Hard Drive ST660211USB some the numerical estimations received in the course of testing of the given arrangement further are resulted.
Testing
As a computer platform for testing of transportable disk drive SeagateUSB 2.0 PocketHard Drive ST660211USB in size of 6 Gbytes compact notebook Fujitsu Siemens LIFEBOOK P7010 used. The test package is presented in a Fig. 1.
Into structure of notebook Fujitsu Siemens LIFEBOOK P7010 enter:
· Motherboard FUJITSU FJNB189 (the processor bus of 400 MHz, Intel chip set 855GME with the built in graphics subsystem and ICH4-M),
· Intel of Pentium M ULV 733 (1.10 GHz, 2048 Kbytes of cache memory L2, clock rate of the processor bus of 100 MHz that provides data transfer with frequency of 400 MHz),
· the Disk drive on hard 2,5-inch magnetic disks HDD FUJITSU MHT2060AT in size of 60 Gbytes,
· Units of dynamic storage DDR333 SDRAM of 512 Mb,
· the Videoadapter presented by resources of the built in drawing of a chip set of Intel 855GME,
· Optical drive MATSHITA UJDA755 DVD/CDRW,
· the Operating system of Microsoft Windows XP Home Edition.
After hooking up of model ST660211USB of disk drive SeagateUSB 2.0 PocketHard Drive to notebook USB-port in a window «My computer» appears a new logical disk. By means of a choice of appropriate options it is possible to output on the display screen of value of information capacity.
In a Fig. 4 fragments of screenshots of the menu of "Property" are presented.
Fig. 4. A fragment of the menu of "Property"
Results of testing of disk drives Seagate USB 2.0 Pocket Hard Drive models ST660211USB and ST650211USB, and also the disk drive from MSI are resulted in Table 2 and in a Fig. 5.
Table 2. The Transfer rate
Arrangements |
Disk Transfer Rate:End (1000 bytes per second) |
Disk Transfer Rate:Beginning (1000 bytes per second) |
Seagate 6GB |
4360 |
7770 |
Seagate 5GB |
4510 |
7430 |
MSI 1,5GB |
5300 |
6050 |
Fig. 5. Results of testing SeagateUSB 2.0 PocketHard Drive ST660211USB, ST650211USB and disk drive MSI
The similar results characterising a transfer rate, have been received and by means of benchmark package SisoftSandra.
From results of testing the compact transportable disk drive created on the basis of new one-inch HDD follows, that, possesses the good high-speed parametres which are not conceding to its predecessor. It allows to recommend disk drive Seagate USB 2.0 Pocket Hard Drive ST660211USB as compact and an effective remedy of carrying over and storage of programs and data.
Transportable 6 Gbytes disk drive Seagate USB 2.0 Pocket Hard Drive ST660211USB have been given on testing by company EASTSIDEConsulting