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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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 ...
4
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2answers
2k views

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 ...
7
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2answers
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LSI 9285-8e and Supermicro SC837E26-RJBOD1 duplicate enclosure ID and slot numbers

I am working with 2 x Supermicro SC837E26-RJBOD1 chassis connected to a single LSI 9285-8e card in a Supermicro 1U host. There are 28 drives in each chassis for a total of 56 drives in 28 RAID1 ...
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2answers
682 views

MegaRAID SAS 8208XLP

I'm just wondering whether anyone knows if I can use a Debian distro with the MegaRAID SAS 8208XLP controller. Currently at the moment LSI only supply drivers/support for RHEL/CentOS but I was ...
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5answers
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Any experience with SATA SAS Interposer Cards?

Driven by the current price difference between SATA and SAS disks on one side and the potentially bad behaviour of SATA disks in bigger storage arrays on the other side, I have found so-called ...
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1answer
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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 ...
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3answers
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Dell R510 backplane/LSI RAID card

I've been tasked to price up and order a new server. My plans are for a Dell Poweredge R510 with the 8 HDD option, an LSI 9265-8i RAID card, two Dell 600GB 15k 3.5" SAS drives in RAID 1, and six Intel ...
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1answer
195 views

Recovery from SAS Harddrive [duplicate]

Possible Duplicate: What are the different widely used RAID levels and when should I consider them? I have 6 SAS Harddrive configured on RAID 0. One of my SAS Harddrive has gone faulty, So ...
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2answers
607 views

SSD in early 2008 Xserve Apple Drive Module

Pretty much the title: it possible to use a modern, 2.5″ SSD in an Apple Drive Module on a early 2008 Xserve? This would be replacing a 15k RPM SAS drive, and in most places I've looked that HDD is ...
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4answers
575 views

7.2K Near Line SAS with Large RAID Controller Cache vs 10/15K SAS

I'm working on an application to capture a lot (10 million +) of really small blocks of data (16 bytes) every day. The data is not sequential (i.e lots of seeking about to write) and it's not a ...
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1answer
290 views

Database server is better to have SAS than SATA, also preferable RAID1?

I want to know if it's better to hast DB server by SAS hard disk than SATA hard disk? And it's also better to use RAID1. I don't know much about RAID. If the server is RAID6 default. Can I change ...
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3answers
2k views

What's the relation between “HP Diagnostics” the “Array Config Utility” and “Windows Disk Manager”

I have a failed drive that is reported in HP Diagnostics https://localhost:2381/hpdiags/frontend2/frontend.php? It tells me that Logical Drive 5 has a drive that is about to fail. The name of ...
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1answer
1k views

Where did the free space go?

I have installed CentOS 5.7 64 Bits in my server which has 4x300 GB SAS drives on hardware RAID 10. At the installation, I chose default partitions. Here are the commands output: [root@server ~]# ...
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2answers
2k views

Dell MD3000, MD1000 and 2950

I have a Dell 2950 with MD3000, MD1000 ; Suddenly the I have lost all drives on both of the enclosures and all drives on the MD3000/1000 are blinking, but only ONE Light on each disk, not 2 Lights. I ...
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2answers
447 views

External SAS cable or adaptor with 90 degree plug

We have an HP tape autochanger mounted in a rack, but it's so deep that with the external mini-SAS cable plugged in we cannot close the rear rack door - if we did we'd crush the SAS cable well beyond ...
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2answers
542 views

Which SAS Cable is required for to connect SAS drive to RAID controller

I have two 2.5" SAS drives which have a SFF-8482 connector. I also have an LSI 9211-8i controller card, as well as a TYAN motherboard with a SAS controller. Both of these controllers use the SFF-8087 ...
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2answers
494 views

Adding nearline SAS disks to a controller with SAS disks

I have a Dell Poweredge 840 server that currently has a pair of hot swappable 146Gb SAS disks attached to a SAS 5IR controller, configured as RAID 1. I have two spare slots to add two add more ...
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1answer
242 views

Dedicated server - do SAS disks make a noticeable difference? [duplicate]

Possible Duplicate: What are the merits of SAS vs SATA drives? I am running a linux centos dedicated server. Basic specs are a Intel Dual Core Xeon X3065with 2GB ram and 2 x 160GB Sata ...
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4answers
4k views

SAS Expanders for DIY JBOD Arrays

I am researching making a DIY SAS array much like the Dell MD1000. My understanding is that these devices do not contain a RAID controller, instead they present all the drives on in SAS domain to the ...
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2answers
519 views

Are branded backplanes useable without specific controllers?

I can't find a disk enclosure which I like, so I'm going to build a custom one (if nothing else, that'll teach me to be picky...). I've got a few HP SAS backplanes lying about, but I'm wondering if ...
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2answers
608 views

HP P411 Storage Controller not recognized during boot

it's me again :( I've asked a question here a few minutes ago ( HP B110i controller not seeing storage array. Any ideas? ) Turns out I was wrong, and there IS a P411 controller built in, I verified ...
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3answers
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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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3answers
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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 ...
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1answer
274 views

ATTO SAS-attached RAID 5 array performance issues on Server 2003

We have an ATTO R380 SAS RAID controller in a Windows Server 2003 HP DL-160 server with 8 700GB Seagate 7200.12 drives. It's configured as a RAID 5 array. ATTO Config says all drives are healthy and ...
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1answer
153 views

IBM EXP3000 SAS rack

A couple of weeks ago one of my EXP3000 SAS Racks was not found by the server. Also, all the Amber fault LED lit, on every disk. Today, this also happened on my other EXP3000 after a reboot - Could ...
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2answers
705 views

Rule of thumb: SATA for storage & serving static content, SSD/SAS for databases?

The question says it all. But, is it true? Can someone explain what's the differentiating factor here (how one type of disk is better than another for a specific purpose)? (FYI, I've tried searching, ...
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8answers
11k 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 ...
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3answers
1k 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 ...
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2answers
612 views

Can we “add” more SAS ports to an existing backplane?

We have a 3U Supermicro chassis with 16 bays on a SAS expander backplane. We have 15 of the bays occupied with hard drives at the moment. We would like to add two more drives to the backplane, but we ...
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2answers
657 views

SAS drive to SAS/SATA backplane then SATA cables to SAS/SATA RAID card?

I just got a Supermicro chasis: http://www.newegg.com/Product/Product.aspx?Item=N82E16816101241 That has a backplane that supports SAS and SATA drives but the backplane has SATA ports to be ...
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1answer
2k views

Linux Multipath + SAS Array, “device errors” are logged to dmesg for passive paths? Possible to stop this?

I have two OpenSuSE 11.4 hosts connected to an LSI CTS2600 storage array via SAS. Every time I reboot the hosts, I see in dmesg output like [ 255.942890] end_request: I/O error, dev sdg, sector ...
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1answer
603 views

Replacing a PERC S300

The PERC S300 card that came with our Dell PowerEdge T110 servers is Windows only (see here). As a result, we're looking for an alternative that works under Linux. We had planned to use software RAID ...
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1answer
239 views

HP P410i as online spare

Is it possible to have dual P410i SAS controllers and use one for a online spare? I am fairly new to HP servers and I will be setting up a new G7 for production use. I have been reading about HP's ...
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1answer
2k views

Dell R910 with Integrated PERC H700 Adapter

I am in the process of designing an architecture based around a single Dell R910 server running Windows Server 2008 Enterprise. I would like the server to have 8 RAID1 pairs of spinning disks, so I ...
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2answers
707 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 ...
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1answer
647 views

SAS controller on Dell power edge 2950 server

My knowledge on Dell server is growing daily, however there are many areas where I still require assistance. For example, Our institution recently purchased a LT2000 tape library system. This also ...
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6answers
7k views

Use of 2.5" Laptop Drives in a Server?

We're acquiring several 1U servers with (8) 2.5" drive slots. Although we can use either SATA or SAS, there is a large price variance as soon as you order 16 or 24 of these drives, so we are looking ...
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5answers
10k 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 ...
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1answer
10k views

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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2answers
2k views

How can I enumerate SAS addresses/WWNs in Linux?

I have some SAS devices in a server, I would like to find out what their SAS addresses are. How can I do that in Linux? I'm using CentOS 6.
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2answers
271 views

When ordering SAS replacement drive, does the hot swappable enclosure matter?

I have a dell PowerEdge and need to replace one of the SAS drives in it. I noticed the supplier I order from does not sell a specific "DELL" SAS replacement drive, but they have what appear to be ...
2
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2answers
282 views

Why is my server's SAS drive 147 GB when most are 146 GB or does that matter?

I need to replace a failed drive in my Dell server's RAID 1 configuration. I pulled the drive and it's a Hitachi Ultrastar 15000rpm / SAS 147 GB. The supplier I usually order from only has SAS 15k ...
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4answers
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Anyone seen a meaningful SAS vs SATA comparison/benchmark?

I hear lots about SATA being slower than SAS but I've only found 1 decent benchmark. http://blog.whitesites.com/SAS-RAID-0-VS-SCSI-RAID-0-VS-SATA-Benchmarks__633689244191943184_blog.htm In this, SAS ...
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1answer
230 views

PERC 6i With external Enclosure Raid Questions

Okay so I am buying some used hardware on ebay and found a few poweredge servers for a good price. These servers come with a PERC 6i card and 4x 146gb internal SAS drives. I want to purchase a 8 Bay ...
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5k views

How do I power SATA drives in my DELL poweredge 2850?

I have a Dell 2850 which I've been fairly happy with. It runs RAID 5 to 6 Hot-swap SCSI drives, but I'd like to add some cheap storage. So I bought an Intel PCI-X SATA raid card and tried to install ...
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3answers
3k views

SAS vs SAS2 interface

I´m pretty new to this server environment and I´m looking to expand the capacity of our HP Proliant DL385 G2 server. I want to replace the 146 GB disks with 300 GB disks. My question is: Can I use a ...
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644 views

LSI 9211-8i won't boot in KVM

I'm running ubuntu 11.04 with an LSI 9211-8i in IT mode with the latest firmware (10). I'm using KVM with VT-d enabled to pass the entire PCIe device through to the guest OS. I have the device ...
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3answers
1k 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 ...
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1answer
842 views

Connecting SAS tape unit to existing P410 controller in HP Proliant ML330-G6 under VMware ESXi 4.1

I have an HP ML330-G6 server with a single SAS/SATA drive bay unit containing a pair of mirrored 250GB SATA disks, running off a P410 SAS controller - all working fine. Now I have just fitted an ...
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823 views

Shrink an HP Smart Array on a P400

I just started consulting for a new client and one of 6 hard drives in their server's SAS array failed. Going over the options of replacing the drive, they didn't like the thought of spending about ...