Case:Customers’ hard disks sometimes occur during the use of slowness, and they do not care about what they will, which eventually causes the hard disk to recognize.Before finding us, the friends who had repaired the computer tried to restore it. His friends repaired the hard disk with software, causing secondary damage to the hard disk….
I am using Windows XP, Windows 2003 and Windows 2000. Each application has a primary icon that is displayed in the taskbar and on the desktop and in the application window. The icon lives in the application files. Can you name a simple and preferably open source resource editor that allows me to quickly and…
Case:The operating system is Windows, the file system is NTFS/FAT, and the 2T Seagate hard disk; during the use process, the computer has a blue screen phenomenon. After restarting, the hard disk is errors. Solution:The engineer evaluates the degree of damage to the physical bad sectors of the hard disk.When reading the hard disk again,…
OS X supports WD FireWire drives without any special software.
If the drive has been working in a prior Mac OS:
If the drive is new:
Note: OS 10.0 or 10.1 only supports Firewire hard drives up to 137Gb.
Case:The data in the client’s mobile hard disk computer partition cannot be seen. The customer takes measures: the USB interface is inserted several times, or the hard disk format cannot be seen.Customers find data recovery through the Internet. Solution:Communicate with customers to understand the approximate situation, saying that it may be formatted, and now I…
When do you think the prices of HDD’s will go back down from the floods?
Different analysts are making different predictions.
Hard Drive Prices to Remain Inflated Throughout 2012(Tomshareware.com)
In Q4 2011, HDD shipments dropped by 26 percent over the same period in the previous year. Shipments will by 13 percent in Q1 and 5 percent in Q2 on an annual basis, IHS believes. In Q3, the market will stabilize and grow by 2 percent and bounce back with 49 percent in the fourth quarter of this year. Sequentially, HDD shipments are predicted to climb 14 percent in Q1, 11 percent in Q3 and 4 percent in Q4.
“The recovery of global HDD manufacturing has begun and will continue during each quarter of 2012, however, the recovery will be prolonged for at least two more quarters, as supply constraints keep unit shipments from climbing on an annual basis until third quarter.” The shortage will translate to continued inflated prices throughout 2012, the firm said.
HDD makers and component suppliers have resumed only partial production in Thailand and have shifted some of their manufacturing to other countries to alleviate the impact of the supply shortage. According to IHS, Western Digital has been the HDD manufacturer most impacted by the floods and is not expected to return to full production until September.
IHS said that the Thailand flood has caused the global average selling price (ASP) for HDDs to jump by 28 percent in Q4 2011. Prices are forecast to decline by 3 percent in Q1 and by 9 percent in Q2.
“Prices will remain high for a number of reasons, including the higher costs associated with the relocation of production, as well as higher component costs because of flooding impacts among component makers, furthermore, PC brands have signed annual contacts with HDD makers that have locked them into elevated pricing deals for the rest of the year.” noted Fang Zhang, storage analyst for IHS.
HDD Printed circuit board (PCB) with board number BF41-00373A is usually used on these Samsung hard disk drives: ST500LM014, HN-M500ABB, 2AR10001, Samsung USB 2.5″ HDD ST1000LM025, HN-M101ABB, 2AR10001, Samsung USB 2.5″ HDD HN-M500ABB, HN-M500ABB/VP4, Samsung USB 2.5″ HDD The BF41-00373A Samsung PCB repair process can usually be divided into 2 steps: find a replacement PCB…
There are several items to consider when replacing a drive from a failed RAID. If you are building a new RAID, then all drives in the array should be the identical model if at all possible.
However, if you must replace a failed drive, it can sometimes be difficult to find the same model if that model is out of production. Below are some tips to follow when selecting a replacement.
Note: Keep in mind that the controller may or may not allow different models in a RAID, so check the RAID controller documentation.
1. Product life: What is the expected life of the remaining drives? If the other drives are approaching the end of their useful life, then it may be time to replace the entire RAID.
2. Capacity: The replacement drive should be the same or higher capacity than the original drive. Do not just look at the capacity on the box, since a few megabytes could make the difference between whether the drive will work or not.
You should check the number of LBAs (or sectors) on the drive. Some RAID controllers will allow you to substitute larger drives if the exact capacity is not available, while other controllers require an exact match. Check with the controller manufacturer if the documentation doesn’t make it clear.
3. Performance: The replacement drive should match the performance of the remaining drives as closely as possible. If your failed drive was 15,000 RPM, avoid replacing it with a 10,000 RPM drive. RAID arrays depend on the timing between drives to write data. Thus, if one drive doesn’t keep up, it may cause the entire array to fail or at least experience irritating problems.
4. Interface: Make sure the replacement drive uses the same type of interface connection as the failed drive. If the failed drive used a SCSI SCA (80-Pin) interface then don’t try to replace it with a 68-pin SCSI interface. With Seagate products the last two digits of the model number indicate the interface.
For example:
LW = 68-Pin
LC = 80-Pin
The 80-pin LC drives are hot-swappable with backplane connections.
5. Cache Buffer: It is recommended that the cache buffer for each drive be the same value. Most RAID controllers will consider drives with mismatching cache buffers to be ineligible for addition to a striped or parity array.
This is a general description of the most frequently asked questions about the IDE/EIDE Interface. This information is meant only to address basic troubleshooting of IDE/EIDE compatibility issues, and is not meant to be an in-depth discussion of all possible error issues. Our purpose is to aid you in solving basic IDE/EIDE difficulties that may arise.
Issues Covered:
1. What is IDE/ATA?
Integrated Drive Electronics (IDE) is a generic term applied to any drive with an integrated (built-in) disk controller. The first drives with integrated controller were Hardcards. In the IDE architecture, the disk controller is integrated into the drive. This combination drive/controller assembly usually plugs into an interface on the motherboard or an interface card plugged into an empty bus slot. The ATA Specification is simply a set of rules or guidelines that an IDE drive should conform to.
2. What does the IDE interface actually do?
The primary job of the IDE interface is to transmit/receive data to and from the drive.
3. Why place the Controller on the drive itself?
Placing the controller on the drive gives IDE drives built-in reliability because data encoding, from digital to analog is performed directly on the drive in a tight, noise-free environment. The timing-sensitive analog information does not have to travel along ribbon cables that may pick up noise and insert propagation delays into the signals. The integrated configuration allows for increases in the clock rate of the encoder, as well as the storage density of drive.
4. What is Enhanced-IDE (EIDE) and Fast-ATA?
Enhanced IDE (EIDE) was a marketing program first initiated by Western Digital. EIDE has two sides:
Fast-ATA, EIDE’s counterpart, was a separate marketing program that was introduced by Seagate and Quantum. This program leaned conservatively toward the ATA-2 specification.
5. What are the main features of EIDE
These are the main features:
6. Is ATA-5, 6 or 7 compatible with older IDE drives?
Older IDE peripherals will work with newer enhanced drives. However you will not be able to fully utilize the enhanced features of your ATA-5, 6 or 7 peripherals.
7. Is ATA-5, 6 or 7 compatible with older IDE controller cards?
EIDE drives are backward compatible with non-EIDE (standard) controller cards. However, an EIDE card will only perform at the capabilities of the controller; hence the EIDE drive will perform like a standard IDE drive.
8. What is ATA-PI
AT Attachment Packet Interface (ATA-PI) is a standard that implements SCSI like devices on the ATA bus. Devices like CD-ROM’s, tape drives and other removable media. The advantages of ATAPI are:
ATAPI’s disadvantage is that it requires the use of software drivers for operability.
9. What is Cable Select (CSEL)?
Cable Select (CSEL) is an optional feature per the ANSI ATA specification. It is an alternative method of identifying the difference between device 0 and device 1 on an IDE interface cable. Hard drives configured in a multiple drive system are identified by CSEL’s value:
Additionally, CSEL requires a specialized (and more expensive) 40-pin 80-wire IDE interface cable, unlike the standard EIDE interface cable that is far more commonly used. We do not recommend using the CABLE SELECT feature unless your specific computer system documentation requires its use.
10. How does my computer know which drive is the Master and which is the Slave?
When only one drive is installed, the single drives controller responds to all commands from the system. When two drives (which means two drive controllers) are installed, both controllers receive all commands from the system. Each drives controller must then be configured to respond only to commands issued to it. In this situation, one controller must be designated as master and the other as slave. When the system sends a command to a specific drive, the other drive’s controller must remain silent. A special bit (the DRV bit) is used in the Drive/Head Register to distinguish between the controllers.
Case:The client connects the connection when connecting the power supply for the hard disk, and then there is a place to smoke. Solution:When I went to the smoke place, I was cut off when I checked the stabilization diode. Remove the tube and measured other places. There is no short circuit.This situation belongs to the…
