Hitachi Data Recovery

Hitachi Data Recovery

Hitachi Completes Transfer of Hard Disk Drive Business to Western Digital

Hitachi, Ltd completed its transfer of Hitachi's Hard Disk Drive (HDD) business to Western Digital Corporation on March 8, 2012.

Drive that uses the SATA (Serial Advanced Technology Attachment) standard to connect storage devices such as hard disk drives. Its features are high capacity and low cost. It is often used in storage systems where data access is infrequent, such as data backup systems.

Hitachi Global Storage Technology (HGST)—a subsidiary of Western Digital (WD)—is known to manufacture some of the most reliable internal and external hard drives in the World. However, according to the recent Annualized Failure Rate (AFR) or Hard Drive Reliability statistics shared by the popular backup cloud service provider Backblaze—Hitachi hard drives (HGST) are among the drives having significant failure rates.

Unreadable Hitachi Drive— Common Reasons & Mistakes

Following are the most common reasons for hard drive corruption leading to errors:

  1. Virus or Malware infection
  2. Bad Sectors
  3. Unplugging drive without Ejection
  4. Unexpected power failure
  5. File System errors

If a Hitachi (HGST) hard drive has turned unreadable, is not recognized, or got accidentally formatted, follow the below steps to recover data from the drive and fix the logical damage to make it readable again.

Requirements for hard disk replacement

Before replacing the hard disks, ensure that you have:

  • Completed a disk health check. This health check should be performed at least one week in advance of the planned disk replacement. See Step1 Performing an Internal Drive Health Check for more information.
  • The following tools and equipment:
    • #2 Phillips screwdriver.
    • A laptop that can be used to connect to the server’s serial port. This laptop must have an SSH (Secure Shell) client or terminal emulator installed. The SSH client or terminal emulator must support the UTF‐8 (Unicode) character encoding. See Accessing Linux on the server and node for more information.
    • A null modem cable.
    • An Ethernet cable.
    • Replacement hard disks.
    • Minimum firmware revision of 7.0.2050.17E2:

      If the system firmware version is older than 7.0.2050.17E2, update it to the latest mandatory or recommended firmware level before beginning the hard disk replacement procedure. Refer to the Server and Cluster Administration Guide for more information on upgrading firmware.

  • The password for the “manager,” “supervisor,” and “root” user accounts on the server with the hard disks to be replaced.
  • A maintenance period as described in Downtime considerations for hard disk replacement.
  • Access to the Linux operating system of the server/node. See Accessing Linux on the server and node for more information.