Can I join the SAS directly?

Instructions for installing SAS semiconductor hard drives

Semiconductor hard drives with a serial attached SCSI interface (SAS interface) can be installed quite easily. It is not necessary to set jumpers or terminators or to make any other settings to enable this hard disk to function properly.
With SAS interfaces, each semiconductor hard disk has its own cable that is directly connected to a SAS host adapter (also called SAS controller). Depending on the SAS controller used, a cable for multiple hard drives (or port replicator cable) may be available and helpful. In contrast to (parallel) SCSI, no ID has to be set, since each hard disk is connected to its own port and therefore all IDs are assigned by the controller.

You can use a SAS hard drive in the same system with SCSI or Serial ATA (SATA) hard drives, as long as both interfaces are supported by the motherboard or by a host adapter. In addition, SATA hard disks can be connected to the same controller as SAS hard disks, if the controller has the appropriate ports. However, it is not possible to connect SAS hard disks to a SATA controller.

BIOS configuration

Most new computers discover devices automatically through the system settings program (CMOS or BIOS). When the system starts, the automatic detection function displays the model number of your hard drive. Seagate hard drive model numbers begin with the letters "ST".

The SAS BIOS of some hard drives has a system setup that is not included in the normal motherboard BIOS. In such a case, the SAS hard drive will only be displayed in the SAS BIOS message. Refer to the motherboard or SAS controller documentation to find out how to open the SAS BIOS setup.

Special notice for users of a RAID host adapter. Many SAS RAID controllers require that the hard drive be assigned to an array before it can be recognized by the operating system. Refer to the SAS controller documentation for information on how to assign the hard drive to an array.

More tips

Check that the SAS channels are also enabled. Most motherboard setup utilities allow the user to disable the SAS ports. If the controller cannot find the hard drive, check that all SAS ports are enabled.

Handling precautions and protection against electrostatic discharge

  • Semiconductor hard drives are fragile. Do not drop the hard drive or bump it into anything. Handle the hard drive by the edges.
  • The hard drive electronics are very sensitive to static electricity. Leave the hard drive in its anti-static package until it is installed. Wear a grounded wrist strap. Ensure electrostatic discharge of all devices in the vicinity of the hard disk and also of all tools that come into contact with the hard disk. Never use an ohmmeter on circuit boards.
  • Use caution when troubleshooting devices that are live.
  • Do not dismantle the hard drive, as this will void the guarantee.
  • Send the entire hard drive to warranty service if a component should be defective.
  • No pressure should be applied to the circuit board or the top of the hard disk, nor should stickers be attached to it.

Installation instructions

  1. Mount the hard disk in the carrier or tray of the host system.

    Most SAS host systems offer the option of installing the hard drive using a carrier or tray. This means that the hard disk can be integrated into the system via hot plugging.

    Fasten the hard disk to the carrier or tray of the host system with four screws of the type UNC 6-32. Do not overtighten the screws or use force. The orientation of the hard drive is not important.

    SAS hard drives are usually connected without any I / O or power cables. However, you can also connect the hard drives using high quality cables with an I / O cable length of up to four meters.
  2. Install the hard drive

    Slide the carrier or tray into the corresponding slot in your host system. This connects the hard drive directly to the SAS connector on your system. The SAS connector is usually on the SAS back panel.

    The hard drive has no jumpers or terminators. Power is supplied via the SAS connection.
  3. Format the drive

    The hard disk is factory-fitted with low-level formatting. You don't need to do any other low-level formatting on this hard drive unless you want to run certain diagnostics through the controller. If you carry out a low-level formatting, you must not cancel the process, otherwise the hard disk will become inoperable.

    Take appropriate precautions to ensure that no power outages or other interruptions to the power supply can occur during formatting.

    You can also use Seagate's SeaTools for DOS to perform a “zero fill”. However, this tool can occasionally cause hard drive problems in a RAID configuration.

    Formatting the hard drive will erase all user data. It is important to be aware of this before formatting a hard drive. A hard drive that was previously used to store data does not need to be formatted unless you want to erase all user data. Seagate is not responsible for any loss of user data.

Operating systems

The semiconductor hard drives can be used with various operating systems. Refer to your system or SAS host adapter (controller) manual for information on formatting and setting up the hard drive for your operating system.

Hot-plugging the hard drive

This hard disk is hot-pluggable. This means that you can install and remove the hard drive without shutting down the host system.

Hard disk power-on options

A majority of systems with only a few hard drives allow all hard drives to start up immediately as soon as they are supplied with power. Systems with a larger number of hard drives can be configured so that the hard drives start up at different times to avoid overloading the system's power supply.

Refer to the documentation for your SAS host adapter or host system for information on changing the hard drive startup sequence.


Problem: The computer does not seem to recognize the hard drive.

  1. Check that the hard drive has also been properly activated using the SAS host adapter setup program.
  2. If so, the hard drive is recognized by the controller. In such a case you have to make sure that the drivers of the SAS controller have been loaded correctly. Refer to the documentation for the controller card to find out how to verify that the controller drivers have loaded correctly.

    If you want to install an operating system on the hard drive, you must first boot from the operating system installation CD and press F6 as soon as you are prompted to do so (the prompt may appear suddenly and only for a few seconds).

    Installation of Windows 8/7 / Vista: Simply click on "Load driver" as soon as you have the opportunity. You may have to press the F6 key.

    Installation of Windows 2000 or XP: After the installation, other messages are displayed and the system then initially behaves as if nothing would happen. Eventually, however, a screen will appear that will allow you to install the drivers for the HBA or controller.