fix a hard drive crash

... Application disk that contains all the applications and a different one for data. Keep a good daily backup of the data disk and maybe a backup of the application drive when major changes are performed. ... This may be all that's needed to restore a drive to a functional state. ã If after the format there are still problems trash the drive. Don't take any chances with a flaky hard drive. ... likely that data is gone. If irreplaceable data was lost, you can try bringing the drive to a hardware shop for professional data retrieval. 5. If any of these attempts to revive the drive has succeeded,...

Ngày tải lên: 22/12/2013, 19:15

... They can pay a good chunk of change and have the data recovered from a company that deals with that sort of thing, and buy another HDD and start all over again. P.S. I'd also put a password ... Worst case scenario. It is the hard drive that does not seem to respond. Then, replace the hard drive with a new Master drive and install the faulty drive as a Slave drive. Make sure you install ... data on the drive. If you need the data then I would send the drive to a data recovery lab that can extract the data from a dead drive and save the data to a tape, CD, HD etc. This can be expensive...

Ngày tải lên: 26/12/2013, 01:16

Ngày tải lên: 27/01/2014, 05:20

... the data on the drive. If you need the data, then I would send the drive to a data recovery lab that can extract the data from a dead drive and save the data to a tape, CD, HD, etc. This can be ... the hard drive can be attached as a "slave" and the important data copied to the "master" bootable drive. Many times that approach can be used even for hardware-related ... replaced and restored. From: Sam Espana I have used several ways to solve the same issue. The reason is the fact that a hard drive is a hard drive is a hard drive, or is it? The answer is...

Ngày tải lên: 23/08/2012, 09:43

Ngày tải lên: 25/10/2013, 21:20

... cable has eighty- conductors it is not as coarse as the CD-ROM cable. Select the proper ribbon cable for the hard drive. Take one end of the ribbon cable and connect it to the back of the hard ... 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 ... similar to the CD-ROM cable. However for each conductor it has an associated ground wire, which is why it has 80 (instead of 40) conductors. This cable can fit into a CD-ROM and visa versa, but...

Ngày tải lên: 21/12/2013, 19:15

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Ngày tải lên: 14/03/2014, 23:20

Ngày tải lên: 19/03/2014, 17:28

Ngày tải lên: 28/06/2014, 07:20

Ngày tải lên: 31/07/2014, 14:20

... Ultra ATA (Ultra DMA) MWord DMA 3/ Ultra ATA 33 33mgbyte/s Ultra DMA 3 44Mbbyte/s Ultra DMA 4 / Ultra ATA 66 66Mgbyte/s Ultra DMA 5 / Ultra ATA 100 100Mgbyte/s Giới thiệu về Serial ATA: Serial ATA ... 56098 Những lợi thế c a SerialATA: Hiệu suất cao hôm nay và tương lai : ngay từ thế hệ đầu tiên SerialATA đã đạt đến tốc độ 150Mbyte/s so với tốc độ tối a mà Parallel ATA (giao diện ATA song song) đạt ... ATA là từ viết tắt c a Address Transfer Area - Định vị vùng truyền dẫn và Ultra DMA – Ultra Direct Memory Access – Định hướng truy xuất bộ nhớ cao cấp. ATA chậm hơn rất nhiều so với Ultra ATA....

Ngày tải lên: 13/12/2013, 04:15

... has its own application domain including the use as a microactuator for the dual-stage actuated hard drives. Finally, we post in Chapter 11 a benchmark design problem for a typical HDD (Maxtor 51536U3) ... algebraic Riccati equation CNF composite nonlinear feedback DSA digital signal analyzer DSP digital signal processor GB gigabytes HDD hard disk drive LDV laser Doppler vibrometer LQG linear quadratic ... medium are written with data that are ar- ranged in concentric circles or tracks. Data are read or written with a read/write (R/W) head, which consists of a small horseshoe-shaped electromagnet....

Ngày tải lên: 14/12/2013, 19:15

... reference and the given system in Equation 3.189, we again assume that all the state variables of the given system are mea- surable and follow the procedures of the state feedback case to define an auxil- iary ... define (3.35) and (3.36) and are associated with the so-called state zero directions of if is an invariant zero of . These subspaces and can also be easily obtained using the special coordinate basis. ... construct a state feedback gain matrix . We have the following result. Theorem 3.17. Consider the system given in Equation 3.48 with and , i.e. all states are measurable. Assume that P has no invariant...

Ngày tải lên: 14/12/2013, 19:15

... design of a linear feedback law with a small closed-loop damping ratio and a nonlinear feedback law through an appropriate Lyapunov function to cause the closed-loop system to be highly damped as the ... by introducing an additional integration action in the design. The new approach retains the fast rise time property of the original CNF control and at the same time has an additional capacity of eliminating ... eigenvalues, which implies that is a relatively small scalar. The remaining closed-loop poles of are placed to have a dominating pair with a small damping ratio, which in turn would yield a fast...

Ngày tải lên: 14/12/2013, 19:15

... than that of the TOC in asymptotic tracking situations. It can also be shown that, no matter how small the target region is, say for any small , we can always find a suitable control law that ... the adverse actuator saturation effects. This can be done through the design of a discrete- time linear feedback law with a small closed-loop damping ratio and a nonlinear feedback law through an ... Butterworth pattern with an appropriate bandwidth. In any case, the corresponding parameters can be further tuned on the main panel to obtain a satisfactory performance for the overall system. S TAGE 4:...

Ngày tải lên: 14/12/2013, 19:15

... approaches and the microactuator is controlled by a proportional gain together with an appropriate filter. 8.2 Modeling of a Dual-stage Actuator In this section we develop a model for the dual-stage actuator. ... dual-stage actuator. Since the VCM actu- ator and the microactuator are decoupled, we need to identify two separate models for the VCM actuator and for the microactuator. A Maxtor dual-stage HDD is ... too many read or write errors, making the disk drive unusable. A suitable measure is the standard deviation of the readings, . A useful guideline is to make the value less than of the track pitch,...

Ngày tải lên: 14/12/2013, 19:15

... e.g., Crandall [203] and Lyon [204]) and (iii) the stochastic lin- earization approach. All of them have certain advantages and limitations. However, the stochastic linearization technique has the ... that if and are of zero means and jointly Gaussian, then and can be easily obtained. Let us assume that and have a joint probability density function exp where is the normalized covariance of and ... is that the application of an electric field can cause mechanical stress/strain in the piezo materials. There are numerous piezoelectric materials available today, including PZT (lead zirconate...

Ngày tải lên: 14/12/2013, 19:15

... DA, Hernandez D, Horowitz R, Packard AK, Pisano AP. Closed-loop control of a microfabricated actuator for dual-stage hard disk drive servo systems. Proc American Contr Conf; Philadelphia, PA; ... 35:2271–3. 165. Suthasun T, Mareels I, Mamun AA. System identification and control design for dual actuated disk drive. Contr Eng Prac 2002; 12:665–76. 166. Takaishi K, Imamura T, Mizasgita Y, Hasegawa S, Ueno ... Automat Contr 1989; 34:831–47. 92. Chen BM, Saberi A, Sannuti P, Shamash Y. Construction and parameterization of all static and dynamic -optimal state feedback solutions, optimal fixed modes and...

Ngày tải lên: 14/12/2013, 19:15

... DA, Hernandez D, Horowitz R, Packard AK, Pisano AP. Closed-loop control of a microfabricated actuator for dual-stage hard disk drive servo systems. Proc American Contr Conf; Philadelphia, PA; ... 35:2271–3. 165. Suthasun T, Mareels I, Mamun AA. System identification and control design for dual actuated disk drive. Contr Eng Prac 2002; 12:665–76. 166. Takaishi K, Imamura T, Mizasgita Y, Hasegawa S, Ueno ... magnetic hard disk drives. Proc 2000 IEEE Int Conf Robot Automat; San Francisco, CA; 2000. p. 953–8. 162. Mori K, Munemoto T, Otsuki H, Yamaguchi Y, Akagi K. A dual-stage magnetic disk drive actuator...

Ngày tải lên: 14/12/2013, 19:15