0
votes
2answers
25 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? ...
9
votes
1answer
223 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
2answers
117 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 ...
1
vote
1answer
124 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 ...
2
votes
1answer
102 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 ...
-1
votes
2answers
138 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 ...
-1
votes
1answer
159 views

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 ...
6
votes
1answer
4k views

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 ...
2
votes
2answers
1k views

Hyper-V 2012 and P2000 SAS SAN

Hi I am having major problems setting up a Hyper-V 2012 cluster on a P2000 SAS SAN. Running System Center VMM 2012 SP1 I am unable to see any storage to create my cluster. Has anyone had experienced ...
0
votes
2answers
490 views

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, ...
26
votes
2answers
5k views

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 business-class storage so expensive?. My question is specifically about SAS drive enclosures, and justifying their expense. ...
1
vote
3answers
2k views

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?
1
vote
1answer
403 views

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 ...
0
votes
2answers
264 views

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, ...
7
votes
5answers
663 views

ML350 G5 - upgrade hot swap drives to 6 Gb/s?

I support a non profit. They got an ML350 G5 donated to them and I immediately put it to good use for them :) It came with four HP 300GB 15K SAS drives - and of course, they have all now failed. I ...
2
votes
2answers
434 views

Do SATA disks on an SAS backplane impose cable length limits?

On two Supermicro 847E16-RJBOD1 enclosures, I have trouble accessing SATA disks on the rear backplane with 6gb/s. The only significant difference between rear and front backplanes is total cable ...
2
votes
1answer
763 views

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 ...
1
vote
1answer
111 views

Can I use an HP Smary Array SAS Controller Card In Non-HP Server? [duplicate]

Possible Duplicate: Proliant raid controller in a PC There are a bunch of cheap HP Smart Array SAS controller cards on ebay and I'm wondering if they will work with non HP servers ...
3
votes
2answers
848 views

DAS vs SAN storage for serving 2 to 4 nodes

We currently have 4 Linux nodes with local storage, arranged in two active/passive pairs with storage mirrored using DRBD, running virtual machines (actually using Xen Hypervisor) for typical hosting ...
1
vote
1answer
2k views

What is the max supported number of SATA devices (using cable adapters) on a Dell SAS 6/iR adapter?

I've got a Dell SAS 6/iR PCI-E adapter. I don't have a multiplier backplane. I'm planning on connecting SATA (non SAS) drives. If I buy cable adapters only (ones that split a SAS connector on the card ...
6
votes
3answers
808 views

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. ...
3
votes
3answers
236 views

HP SAS hdd in non-HP server

I wonder if I could re-use some HP SAS drive in a non-HP server. Description: 146GB 2.5" Serial Attached SCSI (SAS) SFF 3G Single Port Hot-Plug 10K HDD Option Part# 431958-B21 Spare Part# 432320-001 ...
4
votes
2answers
1k 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 ...
10
votes
4answers
2k views

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 ...
2
votes
3answers
668 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 ...
1
vote
2answers
286 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 ...
8
votes
2answers
396 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 ...
1
vote
2answers
428 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 ...
0
votes
2answers
415 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 ...
1
vote
1answer
2k 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
563 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 ...
0
votes
1answer
557 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 ...
25
votes
10answers
19k 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
478 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 ...
1
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 ...
2
votes
2answers
995 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 ...
0
votes
2answers
107 views

SAS, RPM, & Bus Speeds

I am working on spec'ing out a new Hyper-V server, and I am running into something that I find confusing--I have the following choices: 146GB 15k RPM, SAS, 3Gbps, 3.5" 146GB 10k RPM, SAS, 6Gbps, 2.5" ...
1
vote
4answers
3k views

HP smart array P812i and storage works enclosure D2700 BAD PERFORMANCE!

I have HP DL360 G6 with Smart Array P812i and Storage Works D2700 enclosure. Enclosure has 25x148GB 15K SAS 6G drives in RAID10 mode. P812i has 512mb cache (50% read/50% write) Crystal Disk mark ...
6
votes
8answers
2k views

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 ...
8
votes
3answers
26k views

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 ...
2
votes
5answers
119 views

source for enterprise disks [closed]

whats your source for scsi/sas disks - to replace breakage or expand existing systems? the usual suspects (newegg, pricewatch, ZZF) seem to have limited selection.
3
votes
1answer
288 views

IO/s and MB throughput for Various RAID Arrays

Are there any resources that have typical throughput and IOp/s for various RAID arrays under sequential and random patterns? In my case I am more specifically interested in at the moment: 6 Disk ...
0
votes
3answers
2k views

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 ...
9
votes
1answer
1k views

Improving SAS multipath to JBOD performance on Linux

I'm trying to optimize a storage setup on some Sun hardware with Linux. Any thoughts would be greatly appreciated. We have the following hardware: Sun Blade X6270 2* LSISAS1068E SAS controllers 2* ...
2
votes
1answer
986 views

Cascading HP StorageWorks MSA60 and MSA50

We currently have a cascade of two MSA50 arrays connected to a P600 controller. Is it possible to add a MSA60 array to the cascade? HP documentation states that MSA60 is compatible with P600.
4
votes
2answers
2k views

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 ...
3
votes
6answers
261 views

Way to inexpensively temporarily increase storage on production servers?

We have a set of 6 servers in production for storing some massive databases. Right now they have 280Gb of disk space striped and mirrored across 15K SCSI Drives, our existing database fills them to ...