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 ...

learn more… | top users | synonyms

0
votes
1answer
47 views

HP ProLiant ML350e Gen8 v2 Not Detecting Hard Drives

I have tested several solutions but non of them cant detect my 2 hard drives (legacy mode , acpi and raid embended) I have a 2 Dell-Seagate SAS Cheetah 15k,7 hard drives (ST3300657SS) (they are not ...
0
votes
2answers
41 views

1 x Raid card and 6 sata drive over 1 SFF-8087 port [on hold]

I have a question regarding LSI00328 LSI MegaRAID SAS 9271-4i Can I connect 6x sata drives to -4i card or I need -8i version
0
votes
1answer
26 views

“Core Charge” on defective server HDDs

I have collected a pretty decent amount of SAS and SCSI disks over the years that have a predictive failure warning. I was just about to throw them all out, but wondered if any of the manufacturers ...
0
votes
1answer
37 views

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 ...
-2
votes
1answer
63 views

Why does a low level format take very long time?

I can write ~100MB/s on a particular 4TB SAS drive when it have a file system on it, but a low level format on this drive took >16 hours. That's ~70kB/s. Since there is not filesystem and only zeroes ...
-8
votes
1answer
65 views

What is a Fibre Channel disk? [closed]

Our NetAPP SAN uses something called "Fibre Channel" disks. What are Fibre Channel disks, and does this mean that I can't replace them with a NetApp SATA or SAS disk?
0
votes
1answer
51 views

How does loss of DWORD synchronization affect the health of an SAS disk?

I tried to get more information from the error log of an SAS disk by running the following command that prints values and descriptions of the SAS (SSP) Protocol Specific log page. # smartctl -d scsi ...
0
votes
2answers
25 views

Wiping hard drives in an IBM DS3512

I have an IBM DS3512 RAID storage device, which I'm planning to sell. How would I reliably wipe my data off of all the hard drives? As far as I can tell, it abstracts away all direct access to the ...
2
votes
1answer
105 views

Arranging a raidz3 ZFS vdev to tolerate entire JBOD failures?

Let's say I'm going to build a very large 1PB zpool. I'll have a head unit with the HBAs inside of it (maybe 4 port LSI SAS cards) and I will have perhaps 7 45-drive JBODs attached to the head unit. ...
0
votes
0answers
18 views

poweredge 1950 iii disk options

I have a pair of poweredge 1950 iii boxes which I use for a VMware lab. They are loaded with 64 gb of ram (I discovered that this is actually supported), a pair of quad core cpus, and a pair of 300gb ...
0
votes
0answers
23 views

SMART output - what's the significance and meaning of “verify” errors from smartctl -a for a HDD

Does anyone know the meaning of "verify" errors listed in the output of smartctl -a (or more precisely smartctl -l error), as well as their significance, if any, in trying to evaluate the health of a ...
0
votes
1answer
28 views

Can disk drives from a PV MD3220i be moved to a PE R420, and vice-versa?

I've read that some Dell hardware (mostly storage enclosures these days) are picky about drive firmware (i.e. Dell certified drives). But I can't find a definitive answer about swapping Dell-certified ...
3
votes
1answer
92 views

Steady red light on 2 HP SAS drives in RAID 1

I have a HP ProLiant web server with two HP 300GB SAS SFF 2.5 inch drives (Model: HP 507127-B21). Both drives have a solid red light, however there is no indication within the management software that ...
3
votes
1answer
95 views

Are FC and SAS DAS devices standard enough?

Before I ask my questions, here is some background info that may or may not be useful: For the first time I find myself needing a DAS solution. My priority is data through-put in a single direction. ...
0
votes
2answers
32 views

What limits a Device not to detect multiple LUNs behind a single target?

What limits a Device not to detect multiple LUNs behind a single target? What is required to make this possible in broad perspective? I want to know if there are any limitations in SAS/SATA or SCSI? ...
0
votes
1answer
62 views

Is it possible to use a HP P410 Controller in a ML150 Gen5 server? i.e. is there a cable that interfaces with a Gen5 cage?

Specifically I want to use a SAS card (a P410) and some drives that I have spare in a ML150 Gen5 server. If there is a cable that converts mini SAS to the Gen5 SAS cage connection can someone point ...
1
vote
1answer
279 views

HP DL380 G7 using P410 controller with a SAS Expander card

A sever is fitted with a HP SAS Expander card and 10x disks (2x mirrored Arrays). The server is not detecting any logical volumes or physical disks. So is it ok to bypass the expander card and ...
1
vote
0answers
66 views

How to change SAS address on Expander

I have the following setup - two supermicro backplane attached to one controller LSI SAS 9207-4i4e and unfortunately cannot access the disks, during boot there are disks only in one backplane, the ...
9
votes
1answer
277 views

Performance Difference SAS vs. SATA?

Can not find that anywhere it seems. What is the expected performance difference in a storage backend scenario that is heavily parallellized in access (like a SAN, Virtualization host storage etc.) ...
1
vote
3answers
222 views

Can Dell PE 1950 with SAS Controller take SATA drive? [closed]

I am a programmer (not an expert hardware engineer) trying to build a small hadoop cluster at home (at a cheaper price point) for processing some datasets of interest. I am getting these Dell PE ...
0
votes
1answer
251 views

Upgrade to 3x Samsung SSD EVO in RAID-0 — what type of RAID controller to search for? [closed]

My current configuration is a RAID-0 with three conventional 2TB hard drives. I want to upgrade to three 1TB SSD EVO disks, also in a RAID-0 configuration. Using SiSoftware Sandra, I found out that ...
2
votes
1answer
347 views

HP ProLiant with SATA/SAS Drives

I Currently have a DL350 G5. I have 4 74GB SAS drives in RAID that work fine but I tried to add a 1TB WD RED SATA drive for some storage and the RAID controlling isn't giving me an option to create a ...
0
votes
1answer
299 views

How to perform disk test attached to LSI RAID controller

I have four Seagate ST33000657 SAS drives attached to LSi 9260-4i controller. I want to test them for hw errors and bad sectors, before launching into production. I ve tried SeaTools, but it's not ...
0
votes
0answers
47 views

SATA III HDDs not working on SATA II RAID HBA

I would appreciate any help with this. We have Sunfire x4275 disk server with Sun StorageTek SAS RAID HBA and trying to get working these disks: WD RE 4TB Enterprise SATA III (WD4000FYYZ) Sun RAID ...
1
vote
2answers
152 views

Portable SAS Drive (USB/Thunderbolt Interfacing)? [closed]

I have a few spare 2.5" HP SAS SSDs sitting around and collecting dust for about 2-3 years now. They were used for about 1 day in another project that ended rather abruptly. I now have a need to ...
4
votes
2answers
142 views

Difference between SAS multilane, direct-attached HDD and expander backplane?

What's the difference between multilane, direct-attached HDD and expander for SAS backplanes? Supermicro chassis description page Direct attached HDD backplane (TQ version), multilane ...
0
votes
1answer
527 views

Using SATA III SSDs for ZFS pools

I'm thinking of building a ZFS server optimized for random access (PostgreSQL database). I figured that I have 2 options: Use pools consisting of the Crucial M500 960 GB SATA III SSDs. Enterprise ...
0
votes
2answers
45 views

Dell T-420 with Perc 310 controller - how do controller channels map to physical drive bays

The Perc 310 has two SAS controller connectors, SAS-A and SAS-B. Each of these supports which has 4 internal mini-SAS, providing a total of eight lanes of PCI Express. Question is how do these two ...
14
votes
1answer
447 views

Sanity check on 40TB server configuration

I've got 40 years in computing, but I've never had to build a server quite like this one, so this might be a n00b question. I have a client that is going to offer ultra-high def music files for ...
1
vote
1answer
97 views

How to connect a SAS expander like RES2SV240? [duplicate]

I'm afraid this is going to be a very noob question, sorry. I am looking at the RES2SV240 card from Intel. I have never used SAS or an expander, and I'm a bit confused about how it works. First, the ...
0
votes
0answers
42 views

Which RAID C600 Upgrade Keys for S2600CP4 Intel server board to enable SAS features

I need RAID C600 Upgrade Keys for S2600CP4 Intel Server Board to enable SAS features. I am not sure which one shall I use: RKSAS8 or RKSATA4R5?
2
votes
2answers
303 views

HP DL380G6 + MSL2024 LTO6 SAS : Which HBA? [closed]

I'm going to upgrade our backup server and I'd like to confirm that the following specs won't choke after the purchase. It'd be great if you could tell me your opinion Our current setup is: HP ...
2
votes
2answers
143 views

SAS disk and intel motherboard

What kind of Cable shall I use to connect [ http://www.amazon.com/SAS-Enterprise-Hard-Drive-WD1001FYYG/dp/B0090UELTW ] and server board: http://ark.intel.com/products/56334/intel-server-board-s2600cp4 ...
1
vote
1answer
133 views

Additional Storage Options for Hadoop HDFS Nodes

We have a small production Cloudera distribution Hadoop cluster(14 nodes, but growing). As we have expanded our usage of this cluster we have found that disk storage is our biggest blocker and ...
0
votes
1answer
79 views

Can proprietary SATA/SAS drives be used in a standard SATA controller

If I take SATA or SAS drives out of a Dell or HP server and install them in a different machine with a standard SATA or SAS controller will they still be readable? Obviously if they are part of a ...
2
votes
2answers
50 views

Cable compatibility: will SAS 6GB/s fallback to 3 GB/s?

I’m just in the process of configuring a server for RAID 1 by inserting an IBM ServerRAID M1015 card and two Seagate ST2000NM0023 SAS drives. Both controller and drives are rated as 6 GB/s. ...
1
vote
2answers
102 views

Connecting SAS drives to Server which supports only SATA

Is there any adapter or connector available to connect a SAS drive to a Server having motherboard which supports only SATA drives. It is ok if can connect it for temporary. I need to transfer some ...
0
votes
1answer
84 views

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 ...
1
vote
1answer
151 views

SAS IT Mode controllers and SAS Expanders

Lots of semi-related posts, but none that address this scenario. I picked up an LSI SAS1064E-IR based HP Controller. I flashed it with an -IT firmware, and things look somewhat ok. Except that I ...
1
vote
1answer
98 views

Can disk be purchased by user from vender other than Dell and add to Dell PowerEdge R720xd server after the server is purchased?

The following is the price of the 4TB NL-SAS drive offered by Dell for PowerEdge 720xd. 4TB 7.2K RPM Near-Line SAS 6Gbps 3.5in Hot-plug Hard Drive [$663.38] It seems to be too expensive. A similar ...
0
votes
1answer
131 views

Dell H310 RAID controller in PowerEdge 2950 III

Is anyone able to confirm whether the Dell H310 RAID controller will happily live in a PowerEdge 2950 III? It's a PCI Express 2.0 8x card. I see reports of the H700 in the 2950, which is the same ...
0
votes
1answer
86 views

Beginner SAS and SAS2 speed expectations

We have one SAS backplane, without SAS expander, with 8 HDDs and we connect it to the motherboard with 2 SFF-8087 to 4 sas/sata cables. The motherboard supports SAS2 and the SSD supports SAS2. How ...
2
votes
1answer
113 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
300 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
vote
1answer
187 views

ZFS: SAS v SATA - does it matter?

I understand from NEC's white paper, Silent data corruption in disk arrays, that: some SAS drives should have a "T10-DIF" feature to detect silent data corruption; whereas "There is no standard for ...
-1
votes
2answers
152 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 ...
2
votes
1answer
1k 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
1answer
112 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 ...
-1
votes
1answer
67 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 ...
9
votes
5answers
1k 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 ...