this post was submitted on 24 Jul 2023
13 points (93.3% liked)

Ask Electronics

3223 readers
16 users here now

For questions about component-level electronic circuits, tools and equipment.

Rules

1: Be nice.

2: Be on-topic (eg: Electronic, not electrical).

3: No commercial stuff, buying, selling or valuations.

4: Be safe.


founded 1 year ago
MODERATORS
13
submitted 1 year ago* (last edited 1 year ago) by [email protected] to c/[email protected]
 

//Edit: It's a SAS drive. thanks for the help :))

I bought two of these a long time ago, and I recently tried to connect them to a SATA III connector without luck. The size seems to match up, but the block between the two pin segments seems to block it from connecting with SATA III.

Can you help me figure out what kind of adaptor I need ? :))

top 19 comments
sorted by: hot top controversial new old
[–] [email protected] 12 points 1 year ago (2 children)

Pretty sure that is a SAS drive.

[–] [email protected] 3 points 1 year ago (2 children)

I think you're right :)

Will I be able to use it as with a sas to sata adaptor ?

[–] [email protected] 5 points 1 year ago

Depends. If there's a SATA logo on the front then yes.

If not it's probably not supported.

[–] [email protected] 4 points 1 year ago

No. SAS is a different protocol and requires a different host controller. SAS controllers can typically handle SATA drives, but not the other way around.

If this is for a server or desktop machine, you could install a PCIe SAS HBA.

[–] [email protected] 3 points 1 year ago

Almost guaranteed that's what it is.

A modern serial attached SCSI drive. It's been a standard on servers for years.

[–] Brgor 6 points 1 year ago

That's a SAS connector, but unfortunately it won't work with your computer without a SAS card called an HBA or Host Bus Adapter.

[–] [email protected] 5 points 1 year ago

Why yes it's a SAS drive. You can find that in some NAS models for home use too. Otherwise this is usually server land.

The thing with HBAs is that you usually only get virtual disks on the system side because the controller masks the real disks. This is not really needed any more since modern filesystems can do RAID functionality too - and even better and faster - but that does require direct access to the drive.

Many controllers can be patched though or come with a pass through (JBOD) mode out of the box, which allows you to use that kind of drive directly again. Such drives can be obtained used for cheap too so this may be a feasible option to extend the possible amount of drives for a desktop computer at home too a lot. Most controllers support 4-8 devices.

[–] [email protected] 4 points 1 year ago (1 children)

SAS connection - https://cdn.shopify.com/s/files/1/0006/3029/2540/files/SAS_SATA_text_2_1024x1024.png?v=1604503325

You can connect a SATA drive to a SAS cable, but not a SAS drive to a SATA cable.

[–] [email protected] 2 points 1 year ago

There are sas harddrives which support SATA. They are however very rare.

[–] [email protected] 3 points 1 year ago
[–] [email protected] 2 points 1 year ago (1 children)

It’s a 2.5” SAS drive. They’re usually used in servers and typically spin a lot faster than consumer SATA drives. You won’t be able to use it in your PC unless you buy an HBA card and some adapters.

[–] [email protected] 1 points 1 year ago (1 children)

thank you :))

do you know why SAS HBAs are so expensive ? 🥲 is it possible to get a cheap one ?

[–] [email protected] 2 points 1 year ago (1 children)

I got a used 8 port card from ebay for about $20 a few years ago. I had to flash different firmware to it using a DOS boot disk to disable raid though. It's an obsolete card, but it's been working fine in my NAS.

[–] [email protected] 1 points 1 year ago

I'll try to look some more then :))

[–] [email protected] 1 points 1 year ago

Thanks for the help :)))

I'll try to figure out what to do with them ^^

[–] [email protected] 0 points 1 year ago* (last edited 1 year ago)

Looks like that's actually "SATA Express," which has lanes for both PCI and SATA - if you look at the other side of the connector (which you should have already shared!) you'll see even more contacts. You can get either a PCI or SATA adapter in order to use the drive.

Edit: Probably SAS as others said. It uses the exact same connector, which is why I made that guess.

[–] [email protected] -2 points 1 year ago

Can you show us the other side of the drive? Curious what make/model this is supposed to be. Best guess is that this is yet another attempt by a PC manufacturer to sell un-upgradeable units that need to be either replaced as a whole, services only by then, or had at with wire snips and a soldering iron.

I'd say it's time to carefully cut out that tab (leaving the keys intact), and to start being more careful about what you buy.

[–] [email protected] -3 points 1 year ago (1 children)

That looks like one of the notebook SATA variants. It's SATA & power combined in one connector, and passive adapters used to be readily available.

load more comments
view more: next ›