Serial ATA (SATA or Serial Advanced Technology Attachment) is a computer bus interface for connecting host bus adapters to mass storage devices such as hard disk drives and optical drives. Serial ATA was designed to replace the older ATA (AT Attachment) standard (also known as EIDE), offering many ...

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65
votes
8answers
6k views

How can a single disk in a hardware SATA RAID-10 array bring the entire array to a screeching halt?

Prelude: I'm a code-monkey that's increasingly taken on SysAdmin duties for my small company. My code is our product, and increasingly we provide the same app as SaaS. About 18 months ago I moved ...
7
votes
1answer
6k views

How exactly does a SAS SFF-8087 breakout cable work? + RAID/connection questions

Please let me know if my question does not makes any sense as I am not sure if I am interpreting it correctly from my thoughts due to my lack of technical knowledge on this. If I am using a ...
3
votes
4answers
4k views

HP D2700 enclosure and SSDs. Will any SSD work?

I've got an HP D2700 enclosure that I'm looking to shove some 2.5" SSD drives in. Looking at the prices of HP's SSD drives vs something like an Intel 710 and even something less 'enterprisey', there's ...
12
votes
5answers
3k views

ZFS best practices with hardware RAID

If one happens to have some server-grade hardware at ones disposal, is it ever advisable to run ZFS on top of a hardware-based RAID1 or some such? Should one turn off the hardware-based RAID, and run ...
40
votes
3answers
47k views

What are the merits of SAS vs SATA drives? [closed]

What are the merits of buying SAS drives over SATA drives, or vice versa?
6
votes
3answers
15k views

SAS vs Near-line SAS vs SATA

I'm unsure about the differences in these storage interfaces. My Dell servers all have SAS RAID controllers in them and they seem to be cross-compatible to an extent. The Ultra-320 SCSI RAID ...
6
votes
5answers
8k views

SAS or SATA for 3 TB drives?

We are looking to purchase new 3 TB enterprise-grade drives and can buy either SAS or SATA models. AFAIK, SAS generally gives better performance than SATA, but searching for benchmarks I found ...
28
votes
10answers
22k views

Cheapest way to connect 20-24 Sata II HDDs in a budget storage server? [closed]

I need to assemble a high density storage server for as cheap as possible. It's been a while for me and the last systems I integrated didn't even have Sata yet... During my Research I of course ...
13
votes
6answers
8k views

SATA Disks that handle write caching properly?

It's pretty common to see advice to disable the write cache on individual disks used for databases because otherwise some disks will acknowledge writes that haven't yet made it to the disk surface. ...
6
votes
2answers
3k views

HP ProLiant DL380 G4 SATA support?

I'm planning to get a second hand HP Proliant DL380 G4 and setup it as storage server, probably using NexentaStor and setup a ZFS system. But now I wonder does DL380 G4 can be convert or support SATA ...
1
vote
3answers
2k views

Solaris: detect hotswap SATA disk insert

What's the method used on Solaris to get the system to rescan for new disks that have been hot-plugged on a SATA controller? I've got an HP X1600 NAS which had 9 drives configred in a ZFS pool. I've ...
9
votes
3answers
28k views

SAS vs. Nearline/MDL SAS - What is the difference?

As subject I guess, looking at SAN's and most vendors offer 10k or 15k "proper" SAS drives, many also offer 7.2k MDL/Nearline SAS drives. Does anyone have an authoritative explanation of the ...
0
votes
4answers
7k views

SATA hdd errors

I have one server with WDC WD3202ABYS ... There are 100 virtual hosts. Server is working about 5 years and in this time period I have change 4 disks. All with same reason: sata error. The last one: ...
8
votes
3answers
4k views

Deciphering continuing mpt2sas syslog messages

Summary I have been getting these cryptic messages in syslog since I installed some new hardware and I can't figure out what the problem is, if it's serious, or what to do about it. They're from the ...
3
votes
4answers
778 views

Recommended SSD Setup

I'm building a new server which will be running a text search service for our online web services. This service requires fast IO so I am trying to further reduce any potential bottlenecks. I would ...
1
vote
3answers
3k views

Using SATA drives with SAS shared backplane?

Is it possible to use SATA drives when you have a SAS shared backplane to be able to address the drives?
9
votes
2answers
3k views

Is sata 2 backwards compatible with sata 1

Simple question, Is SATA 2 compatible with SATA 1.
4
votes
1answer
2k views

scsi and ata entries for same hard drive under /dev/disk/by-id

I am trying to set up a ZFS pool using 4 bare drives which I have attached to my Ubuntu system via a SATA hot swap backplane. These are Hitachi SATA drives. When I list the contents of ...
1
vote
2answers
2k views

Switch SATA disks in DELL PowerEdge R410

I need a 1U rackserver for hosting a website running on Windows Server and MS SQL. I plan to have a SSD drive for the system and SQL database and a large 1-2 TB standard SATA HDD for a lot of ...
0
votes
1answer
1k views

Mystery stack traces in /var/log/messages

I am seeing the following messages in my server's /var/log/messages. They look like stack traces and are not preceded by any narrative (e.g. "such-and-such has gone wrong"). I am almost certain they ...
5
votes
3answers
4k views

Making SATA disk write cache safe

Supposedly (see, e.g., a question about it here), with NCQ enabled drives, the drive write cache is supposed to be safe, as in it doesn't like to the OS about data being committed to the platters when ...
3
votes
1answer
435 views

Installed 2TB disk in ubuntu server, dmesg reports it as 9444732965540666 MB

I've have an ageing Linux server running on Dell PowerEdge hardware, with a SAS 5IR RAID controller. It has a pair of SAS 146Gb disks in a RAID 1 configuration that has the OS and other software. I ...
3
votes
5answers
4k views

SATA Drive Replacement on Dell PowerEdge R410

I just talked to our Dell rep about purchasing some PowerEdge R410s and R510s and he made a comment that the SATA drives are 'special' and can't be replaced by aftermarket drives because of some ...
2
votes
2answers
1k views

RAID card w/1x mini-SAS connector : how do I physically connect 16 disks?

I'm looking at a MegaRAID SAS 9240-4i Sgl card which has a single X4 Mini-SAS SFF8087 connector. As far as I know, such a connector can be expanded to 4 SATA disks. So, I would know how to connect 4 ...
2
votes
1answer
269 views

3.5" SATAs in an HP DL580 G4

I've been tasked to marry a bunch of 3.5" SATA drives with an HP Proliant DL580 G4 server. Trouble is, this server only takes Small Form Factor harddisks. How can I make this happen in the most ...
1
vote
3answers
1k views

Can I reuse HP Proliant SCSI drives in a custom build?

I have an old HP Proliant DL385. Can I use the drives (36.4 GB - 10k, ULTRA320 SCSI) on a custom build, or is the interface a proprietary HP specific one? What support do I need from the motherboard? ...
1
vote
3answers
881 views

SATA Raid 10 vs SAS Raid 1

I need to setup a small dedi for a few VPS. Obviously the more IO, the merrier. Given these condition, what would you choose? 2 SAS 15k disks in Raid1, or 4 SATA 7.2k in raid 10? Would the answer ...
0
votes
1answer
144 views

Connecting SATA 3 to SAS port performance analysis

SATA 3 hard disk can be connected to SAS ports. But If i connect SATA 3 drive to a SAS port then can i get same speed as SATA 3 originally offers or will it be a difference? Will it reduce the ...
0
votes
5answers
4k views

HP Proliant ML110 G6 as first file server (RAID)?

Bit of a noobie and this will be the 1st server hardware I have purchased. We are a small design studio and I am about to buy our 1st server. I have successfully run Ubuntu on an old PC which has ...