Case:1T Seagate’s mobile hard disk, accidentally falling to the ground, the hard disk cannot be recognized. After the engineer’s test, the magnetic head damage fails, the disk must be treated Solution:The engineer first evaluated the degree of damage to the hard disk.According to the requirements of the magnetic head, select the appropriate hard disk spare…
The hard drive knows nothing about your files and is not aware in any way of the content. That is the job of the Operating System (OS from here on). When the OS asks for a file, the OS will request a logical block from the drive; the drive will translate that to the physical location in CHS. An example is that it might request data from Cylinder 2500 at head 2 located on sector 234. The drive has many spare sectors and sometimes spare tracks to be used to compensate for errors and relocation of data. NOTE: Look at $BadClus on a NTFS File system for what the OS thinks is bad.
In a previous speech here at Defcon 14, I gave the basic inner workings of a hard drive and several ways you can repair it. I am sure that you can get that previous speech on DVD, find it on the web, or on www.myharddrivedied.com and it will give you a large amount of info that I am not going to discuss here today. Additionally, there is a whitepaper on the CD that includes more data and notes about repairing a hard drive.
Since my last speech one of the most common questions I get everyday is “What is that clicking noise? How do I fix it?” This is not a simple problem by any means. So my goal today is to give you more insight into the inner workings your hard drive and explain how this problem occurs and what you might be able to do to fix it.
Slide 1208: In this speech we are looking at the platter assembly where the heads are located, through the area of the preamp and the IC Logic Board down to the PCB. This is the area that affects what is causing the clicking noise that you hear. I am now going to explain how each of these things works and walk you through the drive functions.
Part of what causes this clicking problem is related to the power on routine functions.
The boot sequence of a drive is as follows:
1. Power on chip returns status
2. Self check
3. Spindle spin up
4. Un-mounting heads from rack
5. Servo timing reads – firmware
6. SA reading – firmware
7. Firmware extensions reading
8. Error – read SA from other secondary copies
Case:The operating system is Windows, the file system is NTFS/FAT, and a 450G Toshiba hard disk; the computer repeatedly prompts the file damage during use. After the special equipment detection, there are multiple bad sectors in the hard disk. Solution:The engineer evaluates the degree of damage to the physical bad sectors of the hard disk.When…
Case:A customer is a employee of the state -owned enterprise. It is mainly responsible for the shipment record in the company. It is usually protected by the computer, but I do n’t know why. The information recorded in the computer was gone last night. Solution:Because the data is important, it cannot be lost, so the…
HDD Printed circuit board (PCB) with board number 2060-771949-000 is usually used on these Western Digital hard disk drives: WD3200LMVW-11VEDS0, DCM HAKTJBK, Western Digital 320GB USB 2.5 Hard Drive; WD3200LMVW-11VEDS0, DCM HHKTJHB, Western Digital 320GB USB 2.5 Hard Drive The 2060-771949-000 Western Digital PCB repair process can usually be divided into 2 steps: find a…
HDD Printed circuit board (PCB) with board number 2060-771961-001 is usually used on these Western Digital hard disk drives: WD10JMVW-11AJGS4, DCM EBNT2BB, Western Digital 1TB USB 2.5 Hard Drive; WD7500BMVW-11AJGS0, DCM EHKTJHK, Western Digital 750GB USB 2.5 Hard Drive; WD10JMVW-59AJGS2, DCM HHMT2HKB, Western Digital 1TB USB 2.5 Hard Drive; WD10JMVW-11AJGS4, DCM HBJT2HB, Western Digital 1TB…
The following shows how to create a folder on your Seagate Internet Drive. This assumes that you have already logged into your Seagate Internet Drive account:
Note: For more information on Internet Drive features, visit www.memeo.com.
FreeAgent Drive Flash Video: Seagate Internet Drive – How To Creat a Folder
The following shows how to move folders on your Seagate Internet Drive. This assumes that you have already logged into your Seagate Internet Drive account:
Note: For more information on Internet Drive features, visit www.memeo.com.
Flash Video: Seagate Internet Drive – How To Move a Folder
I can create a collection of pictures giving a 360-degree view from a certain spot, just taking a bunch of photographs from the same spot but in a different direction. However, what software could I use (on Windows) to stitch these images together to get one big image? I prefer something that would stitch them…
Case:This is an HP storage, with a total of 8 hard disks, including two groups of RAID, one group for every 4 hard disks.Of these two sets of arrays, one of them was running normally, and the other groups of four hard disks were all dropped, and the red light was on!The unit is a…
Case:Customers are dual -machine to store IBM DS3200 and two IBM servers, and the IBM DS3200 storage RAID controller is suddenly damaged, causing the data to be accessible.The hard disk is the SAS interface, with a capacity of 300g, a total of 5 pieces.The database is SQL Server 2005.The file size is about 50g.Customers are…
