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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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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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 IBM ...
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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 ...
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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.
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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 ...
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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 ...
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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 ...
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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 6-...
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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 ...
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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 ...
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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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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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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 ...
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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 ...
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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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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, ...
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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 ...
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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 ...
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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 ...
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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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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 ...
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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 ...
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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 ...
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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 ...
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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. ...
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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 is ...
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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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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 ...
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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 ...
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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, ...
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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 ...
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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 ...
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HP Proliant DL140 G3 not booting after installing SAS E500 Controller
The controller is an HP Smart Array E500 Controller and the disk array is an HP Smart Array MSA50.
I have the bios boot order set to have the internal RAID 1 array as the first boot choice, then the ...
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What type of SAS/SATA cables do Dell SAS6/iR and SAS5/iR controller cards use?
I'm considering buying a bunch of these to upgrade our servers at work (with SATA drives, not true SAS). We are out of ports to plug disks into, and these cards are decently supported and cheap.
The ...
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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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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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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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Can the Intel C600-series SAS controller RAID SATA drives?
(Sorry if this is off-topic - technically this is a home workstation setting, but is regarding mostly-server technology.)
I have a GA-X79S-UP5-WIFI motherboard and four ST3000DM001 drives, and the ...
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Does the order of SAS drive matter when installing old drives?
I have an old IBM server with 12 hard drive bays, 4 of which are used (SAS 72GB drives), and configured in a RAID 1 array. The server will be sent away for repairs, when it comes back, do I need to ...
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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
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Windows 2012 RTM Dell G1 1950 and MD3000 with a SAS5 controller?
Seems like a June 6th post by Dell states that the RTM version of Windows Server 2012 should have all the necessary drivers for a Dell G1 1950 -> SAS5 -> md3000 setup.
Can anybody who's tried this ...
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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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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 ...
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ESX 3i Drive Assertion Fault on otherwise working system
The graphic (below) shows the fault I am seeing in VMWare Infrastructure Client, the drive0 light is also flashing. Not sure why, the other drive lights are green. Can't see any errors in the logs and ...
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RAID Controller Link Speed
I was wondering what sequential speed should I expect from a RAID controller that has 1 x MiniSAS 6Gbps port.
In the product details -> Data Transfer Rates: Up to 6Gb/s per port
Does this MiniSAS ...
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HP StorageWorks MSA60 SAS attached enclosure: how to manage online on Windows?
We have a HP StorageWorks MSA60 SAS attached enclosure, with 12x1Tb SATA disks, connected to a P800 controller.
Until now, they were used with a Linux server under the control of an external company.
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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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Connecting a SAS server drive with SATA USB cable + Converter [closed]
I'd like to connect a SAS drive (ST3600057SS) to my computer via a USB SATA cable combined with a SAS to SATA converter.
This doesn't work and I would like to know why and if there's any way around ...
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HP SAS HDD in an EMC VNX storage?
Would it be possible to use HP SAS 6G DP 300GB 10K SFF drives in an EMC VNX 5100 storage unit, which currently holds EMC 10K SFF drives (these are really Seagate Savvio 10K.5 SFF drives).
Generally, ...
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SCSI vs SATA? Is SCSI "actually" better? [closed]
Well, I was talking with a guy about servers the other day. I was a bit shocked whenever I asked him if there was any significant difference between SCSI and SATA and why he always uses SCSI. (note, I'...