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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6answers
5k 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 ...
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 ...
5
votes
1answer
9k 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
1k 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
252 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
votes
2answers
242 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
13k views

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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vote
1answer
214 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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2answers
4k 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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votes
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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0answers
571 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 ...
0
votes
3answers
903 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
vote
1answer
742 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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vote
2answers
663 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 ...
2
votes
3answers
4k views

Linux / Multipath not using all paths, and won't use queue-length path_selector?

I have the following hardware: 2x SuperMicro servers (128GB RAM, 2x 8 core AMDs) 2x/server LSI SAS2008 PCIe MPT-Fusion2 HBAs (2 SAS ports per card) 1x LSI CTS2600 DAS with 24x W.D. 15.7k RPM 600GB ...
0
votes
1answer
1k views

Solaris 11 not seeing all SAS disks on HP P212 controller

I've got an HP X1600 with Solaris 11 installed on it. It's got a P212 SAS controller with a single external port. I've got 2x 10k 2.5" SAS drives installed and configured as RAID 1 on the controller ...
4
votes
4answers
3k views

Is it normal for a SAS drive to have a few bad blocks, or should I replace my drive ASAP?

I have a drive—part of a RAID 1 mirror—that has two bad blocks. Adaptec Storage Manger e-mailed me when it detected the blocks. It shows 4 medium errors for that drive, but state is still “optimal”. ...
2
votes
1answer
2k views

lsscsi finds sas device but none is listed in /dev

I have a server with 2 internal disks with Adaptec hardware RAID and an external disk box connected via SAS. lsscsi finds all the devices: # lsscsi [0:0:0:0] disk Adaptec System ...
1
vote
1answer
2k views

Can I connect a SATA III drive to a SAS controller and get the SATA III performance?

Can I connect a SATA III drive to a SAS controller and get the SATA III performance? Will I see slower performance from the SATA III drive by using a SAS controller than a SATA III controller?
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vote
0answers
109 views

SUN x4600 SAS disk seems to be verry slow

I'm using SUN x4600 with 64GB ram and 2 SAS 146GB 10krpm with Solaris 10 One told me, that the system seems to be slow, so I did a iostat -xtc 5 2 which showed for a long period of time only 4-6000 ...
5
votes
2answers
758 views

Nearline SAS on SATA controllers

I know that SAS drives cannot operate on a SATA controller. I know that SATA drives can operate on a SAS controller. But can Near-Line SAS drives, being SATA drives with a SAS controller, be used on ...
0
votes
1answer
646 views

System can't see ServerRAID M1015 virtual drive?

We connected the card to our system and have created a new mirror RAID 1 virtual drive, Now we want to clone our existing single drive to this new virtual drive, but our cloning software Acronis True ...
1
vote
1answer
743 views

Adaptec 1405 or HP SmartArray P212 SAS controller supported in the stock RH 5.5 kernel?

I am ordering a custom server and looking at either an Adaptec 1405 SAS controller, or an HP SmartArray P212 to use for the internal SAS Ultrium drive (HP Ultrium LTO-4 1760). The server will be ...
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vote
1answer
2k views

HP Autoloader mount, ESXi 4.1 through SAS - will it work?

I need to figure out if I can get this to work. I have a HP P2000 Storage system, connected to 2 x HP DL360 G7 through SAS. Then I got an HP Autoloader with connected through SAS too. Will I, in ...
0
votes
1answer
241 views

Read LUN from dell SAN with a PC on linux

We are currently using a md3000i DELL SAN server with a RAID1. I would like to access the information on one disk from a workstation. The hard disk contains 2 LUN but I can only access the first ...
1
vote
0answers
859 views

SAS vs SATA vs SSD: How to measure performance difference between SATA and SAS?

SAS drives can address multiple IO operations from a single platter revolution if the data happens to be where the head is already positioned. How can you measure whether this actually makes a ...
1
vote
2answers
119 views

LiveLinux PPC variant to boot and perform dd on SAS drive?

Ok here's the deal. In trying to install SLES 11, partd says it cannot read the partitioning on my SAS disk. Specifically I can reuse the existing AIX partition table but not edit it. The drive is SAS ...
4
votes
5answers
2k views

How should I sanitize a SAS drive that I removed from a RAID 5 Array?

I had a disk experience a predictive failure. As a result, I removed the drive and replaced it. Now that I have the drive removed, I would like to sanitize it. What is the easiest way to go about ...
2
votes
3answers
126 views

Plug in 6+ drives into a server (iSCSI/SAS expanders/SAN)

The company where I work has started to run out of disk space at 2.3TB. Originally it was a JBOD of a 1.5TB drive and a 1TB drive as a quick fix measure (yes I know this is bad, that's why I'm ...
0
votes
1answer
199 views

Scale a highly transactional SQL server

I’m looking to upgrade one of my site servers. The site currently executes around 20m sql queries a day and this is growing quite fast. Right now IO throughput is a real issue, so my idea is to move ...
1
vote
1answer
965 views

Does the PERC 5/i Integrated controller support SATA II/III?

I have a refurb 2950 with a PERC 5/i Integrated controller. Currently, there are 4x 3.5" SAS drives in use, with two slots available. I want to add two SSDs (using a 3.5" ICY dock) in RAID1 in the ...
0
votes
2answers
459 views

SAS HBA and P2000 SAS controllers speed

I have HP SC08Ge HBAs and P2000 G3 solution (RAID6, 8+2 spare disks) working on XenServer 5.6.0 . What seems to be strange, is the speed - 35MB/s maximum in one VM (Squeeze). Is it normal or I have to ...
0
votes
4answers
174 views

Best configuration for 6x SAS 10K RPM SAS discs as virtual host

I have an IBM xSeries with 6x SAS 74.8GB 10K discs which I will use as a virtual host (either VKM, Xen or Vmware). What is the suggested best setup of these discs? I have been using raid10, but ...
1
vote
1answer
3k views

Connecting a Direct Attached Storage array to multiple servers

Is it possible to connect multiple servers to the same Direct Attached Storage array, something like the Dell MD1200 or MD1220? I see from the specs that each one of these arrays supports two ...
1
vote
3answers
596 views

Migrate zpool to new SAS controller

Long ago, we bought an Adaptec 31605 under the impression that: a) it could do true JBOD, and b) it was well supported on OpenSolaris. Turns out both of these were incorrect. I'm trying to get my ...
2
votes
2answers
410 views

Replace E200i with P800 or use both?

I'm managing a HP ML 350 G5 machine. It has a SAS controller(E200i) with two ports. Port 1 is attached to 4 drive bays and Port 2 also. Now we have bought a P800 Controller to improve performance. I'm ...
0
votes
1answer
656 views

Install SAS/SATA backplane in Dell PowerVault 220S

Is the backplane of a Dell PowerVault 220S svc tag 3sdpcb1 (14 drive, 80 pin hot swap scsi) upgradeable to a SAS/SATA backplane & controller card replacement? The unit already seems to be quite ...
1
vote
2answers
1k views

SAS vs SSD Performance

Hi does anyone have any input on how a SAS 15k RPM drive would perform compared to a sata based SSD drive, assuming its using the latest verison of sata. These drives would be in a 4 drive raid 10 ...
0
votes
3answers
332 views

Hard Drive Partitions for SAS Drives

We have a Dell server with 3 300GB SAS Drives that are combined as a single drive with two partitions. The partition the OS is on is only 12 GB while the remaining space is on the other partition. We ...
1
vote
2answers
745 views

SATA SSD in Dell Server

I have a Dell R815 (PDF LINK), which has 6 2.5" bays. I would like to put some Intel X25-E in the spare bays, but have been cautioned that they may not fit since they are SATA and the bays are ...
29
votes
10answers
25k 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 ...
0
votes
1answer
534 views

SAN connected through SAS with SATA disk

let's have P2000 G3 with SAS Dual Controller and DL120 G6 with HP SCO3e SAS HBA cards. 1) I know it's bit dumb question, but just to be sure. The array will be filled by SATA disks. Will be the SAS ...
0
votes
3answers
3k views

Disk names in Solaris 10 for ZFS: SAS WWN instead of c0t0d0

I currently have a server running Solaris 10u9 with a SAS enclosure (Dell PowerVault MD1000) filled with SATA disks attached to an SAS card (LSI 3801E). It happily recognizes the 15 disks in the ...
0
votes
1answer
1k views

IBM System x3500 M3 refuses to boot from LSI SAS card if blank SATA drive is connected on mainboard

Have an IBM System x3500 M3 that refuses to boot from the IBM branded LSI SAS card if any SATA drive is also connected to the mainboard. The system restarts itself over and over. No error messages. ...
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vote
4answers
5k views

Will any SAS drive work in a Dell PowerEdge server?

If I bought a Dell 2950 or 2650, for example, and it has no drives in it (from say an auction). Will any SAS drive I get work in it? I ask because they vary so much in price. Some drives are $150 ...
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vote
2answers
1k views

Need help finding a SAS HBA controller for an IBM LTO 4 Tape Drive

I've got an older IBM x3200 M2 Server (MT: 4368) and I recently acquired a used internal IBM LTO 4 tape drive (FRU: 45E1125). The back of the tape drive requires an Internal SAS 29 pin connector ...
3
votes
1answer
3k views

Recovering data from SAS drives after failed SAS Controller Card?

The SAS Controller Card in a production server of ours went bad. This was an older server, and Dell does not have the card in stock and not ETA for one. So, I ordered one from NewEgg. I installed the ...
1
vote
4answers
412 views

Do I have to buy a SAS hd from Dell to work with a PERC 5 in PE1950

Is it true that for SAS hd to work with a PERC 5 controller it must have a special firmware on it put in by Dell which forces you to buy a hd only from them. The hd that came with the server is a ...
0
votes
1answer
84 views

Are zero channel SAS RAID controllers using proprietary protocols?

I have SuperMicro server with a dead zero channel SAS raid card, that is the motherboard has two 36 pin multilane SAS connectors. What I can't figure out is: Can I just buy say an IBM ServeRAID 8X ...
2
votes
2answers
1k views

Can I get redundancy with a JBOD storage subsystem

I have a Promise Technology J610S. This is a JBOD subsystem. Is it possible for me to buy a SAS hardware RAID controller and provide some type of redundancy for these drives? I am unsure whether I ...