All of my start menu “All Programs” items have disappeared. I think they are still there as evidenced by the fact that i can search them, the list is just empty. Solution: This is a known bug with Windows 7 after the number of programs in the menu exceeds 70. It has also been posted…
Serial ATA cables are available in many lengths up to 1 meter. Minimum cable length is 12 inches, using shorter cables can cause timing, or noise interference on the cable. The same conditions apply to cables that are too long. Though the Serial ATA specification calls out supporting cable lengths up to 1 meter or 39.37 inches, PCB traces from the cable connection to the host and drive controllers ASIC, adds length to the bus.
Example: SATA drive installed with a 40 inch cable. PCB trace from Serial host connector to the serial hosts ASIC = 3 inches. The same 3 inch PCB trace applies to the hard disk. This configuration gives you a bus length of about 46 inches. If you are having performance or data corruption issues, try using a shorter cable or different manufacturer of cable. Cable quality can vary between vendors.
We first look at the following two pictures. Picture 1 is the “BIOS CHIP” of the circuit board. When we replace the PCB, we need to swap the “BIOS CHIP” with your original PCB. Picture 2 shows the “Board Number” of the board, and the “Board Number” must be the same! FAQs of 2060-800041-000 PCB…
This article provides a brief history and description of Windows file systems and Mac file systems.
File Systems
A file system organizes large numbers of files on some sort of recording medium (most commonly a disk drive or cd-rom). Mac and PC computers use different primary file systems which is why a program like TransMac is necessary.
The two common versions of Mac file systems (or volume formats) are standard HFS and Mac OS Extended (or HFS+). HFS came about early on in the life of the Macintosh line when disks had relatively small capacities. Limitations appeared in this format when disk drives grew very large in size. Mac OS Extended (or HFS+ as it was originally called) is similar to HFS but some of its internal structures were changed to accommodate the changing needs of modern personal computing. The major differences between the two are outlined below. HFS is best for small volumes or those that may be used on older systems (before OS 8.1). Mac OS Extended is best for larger volumes as long as they will not be used on older systems.
Standard HFS:
Mac OS Extended (HFS+):
Windows uses two primary types of file systems FAT (File Allocation Table) and NTFS (New Technology File System).
FAT:
There are three variations of the FAT file system: FAT12, FAT16 and FAT32. FAT12 and FAT16 originated in the DOS days. They had the same sort of problems HFS had due to growing disk sizes. FAT32 was created to alleviate some of these problems, but it still has limitations like a maximum file size of 4GB.
NTFS:
NTFS was created for Windows NT. It does not have as many limitations as the FAT systems and also includes much needed security and reliability features. Recent versions of Windows (NT, 2000, XP, etc.) support both file system types, but older versions of Windows (95, 98, Me) do not natively support NTFS.
Case:The customer’s hard disk has been using it last night, but today I can’t enter the system today. Solution:Senior engineers must start the data by detecting that the hard disk magnetic head is broken, and the data must be opened to read the data.In the dust -free room, the engineer found a matching magnetic head…
Case:The computer can’t turn on the machine and send it to the computer maintenance company for testing. The maintenance personnel said that the hard disk was broken.There are some important job information in it, and you need to find it.The maintenance staff said they could not recover there.I asked the maintenance personnel to restore the…
Case:The customer’s 32G SD card partition cannot open the prompt formatting normally, and the customer wants to restore the photo file in the card. Solution:The 32G SD card, the partition cannot be opened normally, the dual -clicking the disk format is formatting, after the data recovery engineer testing, the FAT32 file system DBR structure is…
HDD Printed circuit board (PCB) with board number 2060-701640-001 is usually used on these Western Digital hard disk drives: WD10EAVS-98M4B0, DCM DHNNNV2MHB, Western Digital 1TB SATA 3.5 Hard Drive; WD10EADS-65M2B0, DCM HGNCNT2MHB, Western Digital 1TB SATA 3.5 Hard Drive; WD6400AACS-00M3B0, DCM HHRCNV2MGB, Western Digital 640GB SATA 3.5 Hard Drive; WD10EVDS-63U8B0, DCM HANNHV2MBB, Western Digital 1TB…
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Will my new SCSI drive boot my computer? or error message:
no ROM BIOS?
The drive will need to be partitioned and formatted for your computer’s operating system before it can be used as the boot drive. Follow the instructions in the operating system or computer manual for installing a new hard drive and loading the operating system.
SCSI boots from BIOS. Most SCSI controllers feature on-board ROM BIOS to controll the disk drive. Older SCSI controllers may use jumpers or a start up disk to access BIOS. Enable SCSI BIOS for the active partition, C:\, to be recognized. Using more than one SCSI controller? Choose only one to start up. Typically only one active partition is allowed each drive. If BIOS has support for removable disks as hard drives, choose:All Disks. Consult your SCSI controller or system guides.
