Questions tagged [sas]
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 workstations, and it uses the standard SCSI command set.
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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 our ...
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Are SSD drives as reliable as mechanical drives (2013)?
SSD drives have been around for several years now. But the issue of reliability still comes up.
I guess this is a follow up from this question posted 4 years ago, and last updated in 2011. It's now ...
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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 ...
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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 ...
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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 ...
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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 ...
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Why are enterprise SAS disk enclosures seemingly so expensive?
I will begin by stating that I do not believe this is a duplicate of Why is Enterprise Storage so expensive?.
My question is specifically about SAS drive enclosures, and justifying their expense.
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Installing Ubuntu 12.04 on HP Proliant DL380e with 1TB SAS Drive
I have an HP Proliant DL380e with a 1TB SAS Drive and I am trying to
install ubuntu server 12.04 on it.
I have created a RAID array using Array Controller Utility and had a RAID0 logical
volume ...
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What are the merits of SAS vs SATA drives? [closed]
What are the merits of buying SAS drives over SATA drives, or vice versa?
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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 ...
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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 ...
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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 ...
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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 ...
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SAS enclosure doesn't restart - MSA60
I just inherited a HP StorageWorks MSA60 (this is a direct-attach SAS enclosure).
I had to move it to another shelf so I turned off the computer which was using it. I also pulled the 2 power cords off ...
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is it possible to direct connect a client and server with 10GBASE CX4 copper cables?
Server has two 10GBASE-CX4 ports.
client has 10GBASE CX4 HBA.
can theybe directly connected with a CX4 cable without the need for a switch? like SAS Infiband connectors?
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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 ...
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What are SAS external storage options (Promise, Infortrend, SuperMircro, ...)?
We are looking for a ~32T external storage solution for two 48-core AMD servers. These will be used for a small Linux OpenVZ cloud for CPU intensive web-servers and data warehousing. Dual path with ...
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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 ...
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Is it possible to run LSI SAS 9211-8i PCI-E 8 in PCI-E 16 Slot?
I just bought an LSI SAS 9211-8i HBA(Host bus adapter) to use with my new hardware.
I realized after looking at the card that it required an x8 slot and my new mobo only x16 available. I keep on ...
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HDD: performance differences between 7.2k SATA and 15k SAS
What is the rule of thumb in performance characteristics and differences between 7200rpm (SATA/SAS) and 15000rpm (SAS) hard disc drives of the same generation?
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SAS Expander backplane performance drops when more than 8 drives are active?
We are using an LSI 9211-8i raid controller (flashed in IT mode) in a PCI-e 2.0 x8 slot.
It's connected to a supermicro SAS 836EL1 backplane with 1 SFF-8087 cable.
We have 16 drives installed.
When ...
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ProLiant DL380p not recognising HP hard drives on boot
I have two ProLiant DL380p rack mounted small factor servers. I have installed the following drives onto both servers:
1x 240GB SSD drive (Crucial NOT HP branded)
2.5" SATA 7.2k rpm 1TB (HP-branded) ...
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replace controller, add second controller, or use expander?
I have a Proliant DL380 G6 that I am re-purposing as a Hyper-V host for a new, off-site data center that will host our DR services.
The server currently has a P410i controller with the 512MB BBWC ...
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Are 6Gb/s SAS drives compatible with 3Gb/s SAS interfaces?
Are SAS 3Gb/s controllers (SAS1) forward compatible with newer SAS2 drives specified at 6Gb/s? The controller I have in mind is an LSI SAS1064. I know that SAS2 controllers are backwards compatible ...
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Performance differences between 2.5" vs. 3.5" SAS
What real performance gains/losses are there on 2.5" vs. 3.5" 15k SAS drives. Are folks really seeing seek differences, &c?
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Are all SAS drives hot-swappable?
Can get a 300GB Cheetah 15K SAS 3.5 disk for quite a bit cheaper through another supplier vs. Dell's out-of-warranty depot (for an aging PowerEdge server). Specs are identical, wondering if there's ...
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Beginner SAS and server questions
I am a c++ programmer and database administrator looking to expand my knowledge of server administration and maintenance. I have read the Wikipedia pages and several other documents I found by ...
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How to upgrade the firmware of HP SAS expander card without Smart Array controller or Proliant Server?
How can I update/upgrade/flash the firmware of an HP SAS expander card [468406-B21 a.k.a. 487738-001]?
I used to do this using Windows and a HP P410 Smart Array controller, however that controller is ...
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Max SAS throughput of a disk stack?
I've been trying to figure out something.
I have a stack of SAS shelves (attached to a NetApp if that's relevant). Each devices within the shelf is 6G SAS. According to the vendor, the sustained ...
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HP Proliant DL360 G6 Maximum Logical Drives
I have an HP Proliant DL360 G6 server with 8 HD bays. Currently I have the first two bays working with ESXi and I'm just running RAID 0 on a single drive. This is not a production machine. It has a ...
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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 ...
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Does the backplane on an HP server have any impact on the speed of the drives?
I have an HP Proliant DL380 Gen7. The server currently has no drives and is running on the integrated smart array controller. I was looking into replacing the controller with an LSI-9211-8i controller ...
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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 ...
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HP MDS 600 compatibility questions
I've bought a used HP MDS 600 to use as JBOD to a ZFS filesystem.
Originally I just assumed that it was a pretty 'dumb' box and I'd be able to use a SAS card like the 16-port LSI one, and most any ...
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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?
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SSDs or 15k sas for server OS / application drive?
I'm thinking about upgrading the OS / application drive for an HP DL 580 G5 running windows server 2003 64-bit. We currently use 3 75GB 10k rpm SAS drives in RAID 1. The server is mainly used for ...
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Bandwidth with SAS expanders and RAID controllers
Having a RAID controller that has eight internal SATA3 lanes, you can get 6 Gb/s on all eight drives. What if I connect a 24 port SAS expander to an eight port RAID controller, do I still get max ...
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HP B110i controller not seeing storage array. Any ideas?
We got a new HP ProLiant DL160G6 with internal P410 SAS controller, and an additional B110i SAS controller with external ports that is supposed to connect to the HP Storageworks D2600 Drive Array we ...
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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 ...
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Dell SAS 5/ir - secondary disk update "data will be lost!" - will all data, or just secondary disk?
On a Dell SAS 5/ir RAID controller, I have a RAID 1 array which is Degraded.
One drive has failed.
Upon replacing this drive the controller doesn't automatically resync the array.
There's an ...
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Mini-SAS Connector Issue
allow me to apologize in advance, because I am horribly uneducated in this realm, yet I find myself with this problem:
My company hired ProMax to setup all of our networking in our office. One of the ...
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Connect Tape Drive to H330
I'm re-purposing a Dell T430 server. It has an H730 connected to some disks for the OS and storage. It also has an H330, which I'm trying to use to connect an older Tandberg HH LTO4 tape drive.
...
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Why is my drive so full on my Windows 2008 Server
My server is Windows 2008 R2 Standard Server.
I have a secondary SAS drive where all my website files are with the following properties:
NTFS File System
Allow files on this drive to have contents ...
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