Serial Attached SCSI (SAS) is a computer bus used to move data to and from computer storage devices such as hard drives and tape drives. SAS depends on a point-to-point serial protocol that replaces the parallel SCSI bus technology that first appeared in the mid 1980s in data centers and ...

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13
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5answers
7k 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 ...
2
votes
1answer
197 views

Rack Storage - Backplane with 20 SATA connectors or backplane with 5 Mini SAS connectors?

I am comparing two rackmount server chassis (Norco RPC-4220 and Norco RPC-4020, FWIW), which are identical except for the backplane connectors. One has 20 SATA connectors and the other has 5 Mini SAS ...
3
votes
1answer
633 views

Format SAS drives HP DL360G6

hoping you can point me in the right direction here. I scored an older HP DL 360G6 and have been having issues installing ESXi. After a bit of searching around a few people suggested completely ...
-1
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2answers
282 views

High density disk bay rack chassis - why such a big difference in price?

We're looking for a chassis with 45-60 bays for SAS/SATA disks and we found some 60-bay enclosures at ~ $11000 (see here and here for example - there are others as well). However we found this one ...
0
votes
1answer
387 views

Which controller for external SAS tape drive

We're about to buy an external LTO-4 tape drive for our HP DL380g6 server, and since SCSI is on the way out, we'll buy a SAS drive, probably the HP StoreEver LTO-4 Ultrium 1760 SAS External Tape Drive ...
3
votes
1answer
4k views

What is a maximum useful length of SATA/SAS cable

The server in question is DELL PowerEDGE SC1435. I am thinking about buying a LSI 1068e based card with two internal SFF-8087 ports. I intend to use the machine with external multiple hard disk ...
0
votes
3answers
962 views

SSD Performance for PHP?

My programmer just built an application with PHP using Doctrine ORM (will be a high traffic social networking website), and it's very heavy in PHP/Apache and CPU. The queries are wonderfully fast, and ...
-1
votes
1answer
122 views

IBM ServeRAID 2 channels SCSI controller compatible with IBM x366 server which use SAS onboard?

I own an IBM x360 server in which I have an IBM ServeRAID 2 channels SCSI controller for which I use the two channels. Channel 1: the server's HDD. Channel 2: IBM EXP300 HDD Enclosure. Will this ...
1
vote
1answer
623 views

Using 2-port LSI 9286-8e card to control 24 SAS HDDs

I would like to rely on a RAID-on-chip solution to control 24 SAS hard drives in a direct-attached environment. How would you approach this to get best bandwidth given that I'd like to spend less ...
0
votes
2answers
106 views

SAS disk error. should I replace my drive ASAP?

When I try to reboot UBUNTU server boot prints that he find "Foreign configuration" on the adapter. When I boot from secondary (/dev/sdc) disk and run fsck it show me some errors on the first disk. ...
3
votes
3answers
5k views

So you really can push a SATA2 disk into a SAS backplane?

There's only one SAS, right? Serial attached SCSI? The female connectors: SATA2 looks like: ------------| |------- And SAS looks : ------------+-+------- For me, the SATA2 male connector looks ...
2
votes
1answer
229 views

SAS / SAS2… compatible?

Is it theoretically possible to mix a SAS2 controller with a SAS expander? We just happen to have this scenario - the expander (which works fine with an older SAS adaptec controller) is not found and ...
-1
votes
1answer
154 views

SAS SCSI Converter [closed]

I recentely bought a Seagate Cheetah 146GB SAS ST3146755SS 10K Performance 15K RPM Hard Drive from EBAY and do have a computer that supports SAS. The problem is that I need to convert it into a SATA ...
2
votes
1answer
1k views

Third-party SSD in Proliant g8?

Anyone having success with third-party SATA or SAS drives with Proliant G8's? I know the G7's were flaky and had BIOS issues. We're looking for real-world success stories with particular brands and ...
4
votes
2answers
253 views

SAS internal cable compatability

In the office, we've elected to whitebox go with a commodity approach to a certain class of server we'll eventually need a lot of. It's time to consider picking up a few more. It has been a year since ...
3
votes
1answer
1k views

Can I mix SAS and SATA2 drives on one controller?

I've read here that I can't mix SAS and SATA2 drives on the same controller - is that really true? I understand I shouldn't mix on the same channel, but the same card!? For example, when I plug my ...
7
votes
5answers
9k 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 ...
0
votes
1answer
51 views

SAS HBA card or integrated with MB?

I need an entry level virtualization server for a few people and I like the Fujitsu line of this kind, but they all seem to have built-in SATA disk interfaces.. I'd like to use SAS disk and apparently ...
0
votes
1answer
300 views

PCIe SSD vs SSD vs SAS - which is best for Database?

Since I am going on shipping soon I wonder which generally will mostly boost the database performance ? The bridge question is - which will boost mostly a database which having a lot of random block ...
0
votes
1answer
207 views

AOC-LPZCR2 Equivalent RAID card

We have just had a 'AOC-LPZCR2 Low-Profile All-in-One Zero-Channel RAID card' fail. Unfortunately, we are unable to source one straight away. Does anyone know of an equivalent card which we could use ...
1
vote
3answers
5k 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?
1
vote
2answers
4k views

How to use SAS Expander with RAID card?

I've doing some researches since few days and I haven't really got an answer to my question. I am in the process of building a huge file server for the company I work for. We bought a server case ...
75
votes
8answers
9k 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 ...
0
votes
1answer
275 views

Software RAID for a petabyte storage array [closed]

I'm trying to build my first personal storage area network (flexible downtime, speed is not a priority) to hit 1 petabyte on a budget, and am considering a modification of the Backblaze pod as the ...
0
votes
1answer
860 views

IBM x3650 M1 SATA support up to 2 Tb

I have an IBM x3650 (M1 [i think because of DDR2 rams]), an as i know it only support SATA hard drvies only up to 1 Tb. Is there any RAID controller firmware/BIOS update which can give the server 2 ...
2
votes
3answers
4k views

Can I use a Smart Array P410 controller on a HP Proliant DL 180 G5 server?

This link says the HP Proliant DL 180 G5 server only supports Smart Array E200, E500, P400 and P800 controllers. Can I use a Smart Array P410 instead? Currently the server has only the default ...
2
votes
2answers
508 views

What cable do I require for SFF-8087 to SAS

I have a HP P410 and two 2.5" SAS Drives, i want to connect both those SAS drives to one port. I know the cable for the P410 is a SFF-8087 and ive seen plenty of adapters searching, but alot of them ...
3
votes
4answers
6k 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 ...
-1
votes
1answer
218 views

How does plugging in a SATA drive to an SAS backplane affect maximum cable length?

The limit on SATA cable length is 1m, whereas the limit on SAS cable length is 10m. When using a backplane which advertises support for SAS and SATA, with a SAS RAID controller and one SATA drive, ...
2
votes
1answer
493 views

GNU/Linux: SAS-disk detected as /dev/sg7 - not as /dev/sdb

I have just installed a SAS disk into a Debian server. It was detected correctly and everything was fine. Then I moved the SAS disk to a different Debian server, the same hardware model and running ...
0
votes
0answers
423 views

How is the boot order of SAS drives determined?

This probably seems like a simple question, but hear me out. Here's the scenario that caused me to ask this question, as this is not so much a "how to" question but a "why" question: I was trying to ...
5
votes
1answer
212 views

26 hard drive limit on x86 servers, IBM x3650, Dell PE 2950, Dell PE 2850, where is my limitation?

This is in regard to mass HDD wiping/testing. The software I use, WipeDrive Pro 5 and 7, both fall victim. I originally thought it was a limitation of the software, but after speaking with the ...
0
votes
2answers
351 views

Dell PowerEdge 1950 Drive Bay not showing in SAS Configuration Utility

We have a Dell PowerEdge 1950 in RAID 1. Recently, the drive in Bay 0 began rapidly blinking green (I'm guessing twice per second, indicating "identifying drive"). When I open the SAS ...
43
votes
3answers
48k 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?
3
votes
1answer
679 views

Connecting our first tape drive (SAS) to SATA bus

Our small team is considering buying our first tape drive for backups. However, we are still lacking serious enterprise-grade servers and have to rely temporarily on SATA drives in our rigs. Cost ...
2
votes
3answers
776 views

Enterprise Tape Backup solutions

I'm currently attempting to re-architect a backup solution where I'm working. We've got 2 NAS devices, one in the office, one in the datacentre. The servers in the DC back up to the DC NAS, which ...
0
votes
1answer
106 views

What does a RAID controller do if its conection to a SAS expander is severed? [closed]

When you have a RAID controller managing an array over a large amount of disks in an external chassis with a SAS expander, what happens if someone accidentally powers off the external chassis or ...
2
votes
2answers
452 views

How to use SAS expanders with Adaptec 2405 Raid Card

I have a server with Adaptec 2405 RAID card. I have 4 hard drives attached to it. I want to add 4 more. Adaptec site says 2405 can handle up to 128 hard drives with SAS expanders. It's not clear to me ...
6
votes
1answer
5k views

Do SAS expanders work transparently with SAS controllers?

I'm new to SAS expanders and I'm trying to get things right. I understand that SAS expanders, when used with SAS controllers which supports expanders, allows you to utilise the full capacity of ...
1
vote
2answers
650 views

Using an SAS Expander with a SAS Controller of a different brand

I'm planning on assembling a server, and I'm just wondering if a SAS expander by IBM (such as this one) would allow me to use the RAID and other features (Battery-backed write-back caching) of a SAS ...
6
votes
3answers
2k views

Dell MD1000 and an x4 SAS connector throughput / layout

I'm trying to get my head around how a multi lane x4 SAS connector works in a DAS system such as the Dell MD1000. I understand that each lane is 3Gbps, and that multiple hard drives can share a lane. ...
0
votes
1answer
3k views

Error messages in x3550 related to hard drives not detected at bios level

I have an IBM x3550 when I start it I get the following messages: no logical drives found no int 13 drives to support bios not installed I go into diagnostics and I noticed that SCSI ...
1
vote
1answer
307 views

Using both expanders in HP D2700

I am considering purchasing an HP D2700 for use with SSDs (Samsung Pro 840's), for use in realtime playback of high resolution images. The D2700 has two I/O modules (which I assume are the actual SAS ...
1
vote
0answers
92 views

SAS/SCSI Errors in Syslog: Kernel FAILED

I have a Dell 2950 2U rackmount server with 3 146GB SAS drives in a RAID array, running Slackware 10.2 (an old version, I know). Recently I am seeing these errors in my /var/log/syslog repeating very ...
1
vote
0answers
218 views

SAS RAID Card not accepting disks

I have just purchased a Dell 6/IR SAS RAID card for a Dell SC1435 Poweredge Server that I bought a few months ago on eBay. When I got it, the SAS RAID card fitted (a 5/IR) was faulty and it was ...
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votes
2answers
117 views

Is it ok to run 15k.6 and 15k.5 SAS disks in a SAN together?

I have a SAN (HP MASA 2012) running seagate Cheetah 15k.6 drives. One has failed and I have a replacement drive that is the same except for it is a 15k.5 drive. Is this ok to run in the SAN? What are ...
1
vote
2answers
906 views

No drives showing on LSI 2008 SAS + HP SAS Expander

Followin this guide http://www.servethehome.com/supermicro-x8si6-f-motherboard-review-including-onboard-lsi-sas-2008-controller/ I got myself an RPC 4224 case (They are called Inter-Tech in Europe, ...
0
votes
1answer
688 views

New HDD swap in SAS 6 ir shows it is missing?

SETUP: Dell Poweredge T410 with Windows Server 2003, SAS 6 IR Raid-1. Both the original drives were Dell Certified Seagate Barracudas for enterprise, 250gb. The new HDD is a Seagate Barracuda 500gb, ...
2
votes
5answers
369 views

HA Cluster having tower 4U server with SAS

I'm a little bit confused in here.. I want to have 2 node cluster with shared storage. I read all wiki page about HA cluster. Now in my head there's a scheme like: So we have two 4U tower servers ...
0
votes
1answer
628 views

HP ProLiant DL360 G4p compatibility with external SAS enclosure

I have a ProLiant DL360 G4p and a StorageWorks MSA60. The SmartArray controller currently in the DL360 is a SmartArray 6400. I would like to upgrade it to a controller with external mini SAS so I ...