Editing SATA (section)

=== SATA 1.5&nbsp;Gbit/s and SATA 3&nbsp;Gbit/s <span class="anchor" id="FORCE-150"></span><span class="anchor" id="OPT1-ENABLED"></span> ===
The designers of SATA standard as an overall goal aimed for backward and [[forward compatibility]] with future revisions of the SATA standard. 
To prevent interoperability problems that could occur when next generation SATA drives are installed on motherboards with standard legacy SATA 1.5&nbsp;Gbit/s host controllers, many manufacturers have made it easy to switch those newer drives to the previous standard's mode.
Examples of such provisions include:
* Seagate/Maxtor has added a user-accessible jumper-switch, known as the "force 150", to enable the drive switch between forced 1.5&nbsp;Gbit/s and 1.5/3&nbsp;Gbit/s negotiated operation.
* Western Digital uses a jumper setting called ''OPT1 enabled'' to force 1.5&nbsp;Gbit/s data transfer speed (OPT1 is enabled by putting the jumper on pins 5 and 6).<ref>{{cite web|url=https://support-en.wd.com/app/answers/detailweb/a_id/1991|title=Windows: Install Serial ATA, EIDE, SSD Drive and Set Jumper Settings|archive-url=https://web.archive.org/web/20221130233258/https://support-en.wd.com/app/answers/detailweb/a_id/1991|date=20 August 2018|access-date=30 November 2022|archive-date=30 November 2022|work=Western Digital|url-status=live}}</ref>
* Samsung drives can be forced to 1.5&nbsp;Gbit/s mode using software that may be downloaded from the manufacturer's website. Configuring some Samsung drives in this manner requires the temporary use of a SATA-2 (SATA 3.0&nbsp;Gbit/s) controller while programming the drive.

The "force 150" switch (or equivalent) is also useful for attaching SATA 3&nbsp;Gbit/s hard drives to SATA controllers on PCI cards, since many of these controllers (such as the [[Silicon Image]] chips) run at 3&nbsp;Gbit/s, even though the PCI bus cannot reach 1.5&nbsp;Gbit/s speeds. This can cause data corruption in operating systems that do not specifically test for this condition and limit the disk transfer speed.{{Citation needed|date=June 2014}}