hard disk drive recovery
Tài liệu Tổng quan về Ổ cứng Hard Disk Drive (HDD) doc
Ngày tải lên :
13/12/2013, 04:15
... từ) với máy tính. EIDE là một bước phát triển
Tổng quan về Ổ cứng - Hard Disk Drive
(HDD)
Welcome to my “Just about Hard Disk Drive Tutorial ! Tôi đã tốn khá
nhiều thời gian cho việc chỉnh sửa ... tôi chỉ lấy duy
nhất chuẩn ổ cứng IDE (Intergrate Drive Electronics) để phân tích và
minh họa.
A. Cấu trúc vật lý của ổ cứng:
Ổ cứng (Harddisk driver) là một kiểu thiết bị lưu trữ dữ liệu (storage
device). ... là Ontrack’s Disk Manager
hoặc là Micro House’s EZ -Drive, bởi vì có rất nhiều máy vi tính không
có BIOS hoặc controller hỗ trợ những ổ cứng IDE dung lượng lớn.
-Extended Intergrated Drive Electronics...
- 27
- 760
- 6
Tài liệu Hard Disk Drive Servo Systems- P1 docx
Ngày tải lên :
14/12/2013, 19:15
... Cataloguing in Publication Data
Hard disk drive servo systems. - 2nd ed. - (Advances in
industrial control)
1.Servomechanisms 2.Data disk drives - Design 3 .Hard disks
(Computer science)
I.Chen, ... new
applications hardware into the hard disk drive servo system problem: microdrive
systems and piezoelectric actuators; nonlinear system effects are prominent in
these new hardware systems. ... had the heads of the hard disk in contact with the disk sur-
face. This was done to allow the low-sensitivity electronics to be able to better read
the magnetic fields on the disk surface. However,...
- 50
- 565
- 0
Tài liệu Hard Disk Drive Servo Systems- P2 docx
Ngày tải lên :
14/12/2013, 19:15
... this section will be utilized heavily in later
chapters to solve track-following problems in hard disk drive servo systems.
3.6.1 Continuous-time Systems
Consider the following continuous-time system:
(3.189)
where
is ... such as PID control,
optimal control, control, linear quadratic regulator (LQR) with loop transfer
recovery design (LTR), together with some newly developed design techniques, such
as the robust ... mentioned
earlier, the above technique will be utilized to identify the model of a commercial
microdrive in Chapter 9.
Please purchase PDF Split-Merge on www.verypdf.com to remove this watermark.
...
- 50
- 370
- 0
Tài liệu Hard Disk Drive Servo Systems- P3 ppt
Ngày tải lên :
14/12/2013, 19:15
... PDF Split-Merge on www.verypdf.com to remove this watermark.
3.7 Loop Transfer Recovery Technique 91
Let us define recovery error as
(3.267)
The LTR technique is to design an appropriate stabilizing
such ... in a track-following servo have been proved to be robust
against resonance mode changes from disk to disk and work well against runout
disturbances.
The MSC law that combines the PTOS and RPT controllers ... the composite nonlinear feedback law in
Equation 5.21 internally stabilizes the given plant and drive the system controlled
output
to track asymptotically the step command input of amplitude from...
- 50
- 359
- 0
Tài liệu Hard Disk Drive Servo Systems- P4 ppt
Ngày tải lên :
14/12/2013, 19:15
... commercially available HDD servo systems to
date are designed using a conventional PID approach. For drives with a single VCM
actuator, designers would encounter problems if they wished to push up ... reduced-order CNF control law given by
Equations 5.185 and 5.186 internally stabilizes the given plant and drives the system
controlled output
to track asymptotically the step command input of amplitude
from ... discrete-time CNF control law in
Equations 5.177 and 5.178 internally stabilizes the given plant and drive the system
controlled output
to track asymptotically the step command input of amplitude
from...
- 50
- 314
- 0
Tài liệu Hard Disk Drive Servo Systems- P5 pdf
Ngày tải lên :
14/12/2013, 19:15
... minimum. Having
deviations that are above the tolerance of the disk drive would result in too many read
or write errors, making the disk drive unusable. A suitable measure is the standard
deviation ... presence of runouts.
For actual drives, prewritten PES data might be estimated at high sampling rates
using servo sector measurements (see, for example, [141]). In disk drive applications,
the variation ... spinning magnetic disk. Therefore, we
actually have to add the runouts and other disturbances into the system manually.
Based on previous experiments, we know that the runouts in real disk drives are
composed...
- 50
- 332
- 0
Tài liệu Hard Disk Drive Servo Systems- P6 pdf
Ngày tải lên :
14/12/2013, 19:15
... www.verypdf.com to remove this watermark.
246 9 Modeling and Design of a Microdrive System
onto the target track, and is driven by a VCM driver, a full bridge power amplifier,
which converts an input voltage ... circuit of a
typical VCM driver is shown in Figure 9.3, where
represents the coil of the VCM
actuator and the external input voltage is exerted directly into the VCM driver to
drive the coil.
In order ... friction.
Through a detailed analysis of the VCM driver circuit in Figure 9.3, it is straight-
forward to verify that the relationship between the driver input voltage and the current
and voltage...
- 50
- 350
- 0
Tài liệu Hard Disk Drive Servo Systems- P7 pptx
Ngày tải lên :
14/12/2013, 19:15
... to hard disk drive servo system. Proc 6th Int Workshop
Adv Motion Contr; Nagoya, Japan; 2000. p. 246–51.
5. Hara S, Hara T, Yi L, Tomizuka M. Two degree-of-freedom controllers for hard disk
drives ... from disk
to disk in a batch of million drives. Note that many new hard drives in the market
nowadays might have resonance modes at much higher frequencies (such as those
for the IBM microdrives ... for hard disk drives. Proc 24th IEEE Ind Electron Soc
Ann Conf; Aachen, Germany; 1998. p. 1405–10.
157. Hernandez D, Park SS, Horowitz R, Packard A. Dual-stage track-following design for
hard disk...
- 20
- 415
- 0
Tài liệu Hard Disk Drive Servo Systems- P8 docx
Ngày tải lên :
14/12/2013, 19:15
... for hard disk drives. Proc 24th IEEE Ind Electron Soc
Ann Conf; Aachen, Germany; 1998. p. 1405–10.
157. Hernandez D, Park SS, Horowitz R, Packard A. Dual-stage track-following design for
hard disk ... control for hard disk dual-stage servo systems.
IEEE Trans Magn 2001; 37:949–54.
161. Li Y, Horowitz R. Track-following controller design of MEMS based dual-stage servos
in magnetic hard disk drives. ... access control for disk
drives. IEEE Trans Magn 1996; 32:1793–8.
145. Yamaguchi T, Nakagawa S. Recent control technologies for fast and precise servo sys-
tem of hard disk drives. Proc 6th Int...
- 9
- 340
- 0
An introduction to disk drive modeling
Ngày tải lên :
12/09/2012, 14:16
... characteristics for two disk drives, as well as a brief description of a
simulation environment that uses the disk drive model.
Characteristics of modern disk drives
To model disk drives, we must understand ... drive.
Related work. Disk drive models have been used ever since disk drives became available as storage
devices. Because of their nonlinear, state-dependent behavior, disk drives cannot be modeled ... of a disk drive 7 model contribute to its accuracy, we selected a noncaching disk drive (the HP
C2200A) as our first example so that the cache would not interfere with our analysis of the disk...
- 19
- 1.1K
- 0
Tài liệu Upgrade.Hard.Disk pdf
Ngày tải lên :
21/12/2013, 04:19
... your PC’s existing hard drive. To prevent future problems, make sure the cur-
rent drive in your PC is trouble-free. Run ScanDisk (StartãProgramsãAccessoriesãSystem
ToolsãScan Disk) and check the ... attach the old drive as a secon-
dary hard disk and use it for archives and
less frequently accessed data.
All major drive makers pack software
with their upgrade kits that prepares the
drive for ...
u
Set the drive jumpers.
Usually, you’ll install your
new drive as the sec-
ond drive on the
primary IDE
channel (the
same chan-
nel where the
current drive
is connected).
When two IDE drives
are...
- 4
- 215
- 0
Tài liệu Dual Boot Windows 7 bằng Virtual Hard Disk ppt
Ngày tải lên :
22/12/2013, 22:18
... các bc sau:
ã Nhp lnh diskpart
ã Khi môi trường lệnh diskpart đã sẵn sàng, hãy tạo một file VHD với tên gọi win7 có thể mở rộng
tới 20GB bằng lệnh sau:
create vdisk file=”d:\win7vhd\win7.vhd” ... lệnh sau:
BCDEdit /default {current}
Lệnh DiskPart
Khi cửa sổ Command Prompt đã được mở, tiếp theo bạn sẽ phải sử dụng một chuỗi lệnhDiskPart để
tạo và chuẩn bị file VHD. Nhớ rằng khi ... Unallocated Space với dung lượng bạn chỉ định trong lệnh
DiskPart. Sau khi lựa chọn bạn sẽ thấy mộ
t cảnh báo Windows cannot be installed to this
disk (Windows không thể cài đặt vào ổ đĩa này) và thông...
- 5
- 386
- 0
Tài liệu Giải quyết lỗi “Setup did not find any hard disk drives” khi cài Windows XP ppt
Ngày tải lên :
23/12/2013, 18:15
... báo lựa chọn driver. Nếu không biết chính xác driver
nào, bạn có thể sử dụng
Device Manager trong Vista để tìm chính xác thiết
Giải quyết lỗi “Setup did not find any hard disk drives” khi ... gặp màn hình lựa chọn các driver. Nếu kích vào nút
Insert, bạn có thể chọn giữa việc thêm một driver đơn hoặc một thư mục
driver. Trong trường hợp này là thư mục driver mà bạn đã tìm kiếm và ... trong những lỗi thường gặp khi cài đặt mới Windows XP là thông báo
“
Setup did not find any hard disk drives” (Không tìm thấy ổ cứng trên máy
tính
) và nó khiến bạn bối rối vì rõ ràng là máy tính...
- 9
- 524
- 1
Tài liệu Floppy Drive, Hard Drive, and CD-ROM Installation pptx
Ngày tải lên :
21/12/2013, 19:15
...
Step 3
Install the hard drive.
Note: The 3.5” cover for the hard drive bay does not have to be removed. Line up the
hard drive with the lower 3.5” bay. Slide the hard drive in until the screw ...
connectors attach to the drives.
Most power supplies support four IDE drives and two floppy drives. The connectors for
the floppy drives and for the IDE drives (CD-ROM & hard drive) are different. ... the hard drive will not work properly if
they are switched. The easiest way to tell the difference between the CD-ROM ribbon
cable and the hard drive cable is to feel them. Since the hard drive...
- 3
- 267
- 0
Tài liệu 200 ways to revive a hard drive pdf
Ngày tải lên :
22/12/2013, 19:15
... the hard drive to the settings in the BIOS.
ã Then I would see if FDISK sees the hard drive from a Win98 boot disk (which has FDISK on it).
ã Then I would proceed to use the utility Hard Drive ... Make a boot diskette. FDISK, FORMAT, EDIT, SCANDISK, CD-ROM drivers, and the
hard drive vendors diagnostic programs should all be on the diskette.
200 ways to revive a hard drive
Page ... boot disk.
200 ways to revive a hard drive
Page 48
www.techrepublic.com
4. Use a Data Recovery program if the drive will spin up. Get the data off the drive.
5. Fdisk/MBR the drive...
- 74
- 512
- 0