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22
votes
5answers
25k views

What is the difference between SAN, NAS and DAS?

What is the difference between SAN, NAS and DAS?
6
votes
3answers
827 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. ...
6
votes
4answers
2k views

What Makes Cloud Storage (Amazon AWS, Microsoft Azure, google Apps) different from Traditional Data center storage networking (SAN and NAS)?

Some confusion because of my question so to make it simple : "What kind of storage do big cloud providers use and why?" As far as i understand, however I am not able to find any kind of official ...
3
votes
4answers
338 views

Can I keep the data on my Raid 1 drives if I move them to a new Raid controller?

I have a couple of servers I'm about to decommission and they each have 2 raid 1 drives. I want to take these drives and put them in a DAS but I am told that I will lose the data because the raid ...
3
votes
1answer
780 views

VMware with the HP MSA70

I would like to build a new smallish VMware cluster - only two nodes will ever be used. I have previously seen references to shared direct attached storage. That would dramatically push down the ...
3
votes
2answers
861 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 ...
2
votes
2answers
3k views

What is Best storage servers infrastructure ? DAS/NAS/SAN or installing GlusterFS/LUSTER/HDFS/RBDB

I am trying to design an infrastucture for the project I am working on. It would be somehow a file-sharing/downloading project (like rapidshare) and I would need high storage sizes and good scability, ...
2
votes
1answer
606 views

VMWare Setup with 2 Servers and a DAS (DELL MD3220)

I am planning to use a VMWare based setup consisting of two VMWare servers (2 CPU, 256GB Memory) and a DAS (DELL MD3220 with 24x900GB disks). The virtual machines will be half running MS SQL databases ...
2
votes
3answers
266 views

Best way to attach 96 tb to workstation

I'm running a workstation with dual xeon 5690's (12 physical/24 logical cores), 192 gb of ram (ie, maxed-out), Windows 7 64bit, 5 slots for adapter cards, and 1 tb of internal storage, with 5 more ...
1
vote
2answers
619 views

How does Direct Attached Storage (DAS) work?

I am about to order a server including a DAS with 12 HDDs. However, since I haven't used such a device before I am not sure if I understood its functionality correctly. If I connect such a device to ...
1
vote
1answer
171 views

How many RAIDs per RAID controller

I am going to build a SQL server and I need to have four independent RAID 10s. I am looking at different RAID controllers to choose from. For instance I am looking at LSI 9260-8I but I cannot figure ...
1
vote
1answer
214 views

Good SAN sequential I/O throughput

We have an EMC San - CX4-240C filled with 15k (4Gb) Fibre Channel disks setup in RAID 5. Our applications that run on this SAN do primarily Sequential read and write of large text data files. I'm ...
1
vote
5answers
230 views

Upgrading old SAN, expected performance increase?

I am working with a postgresql database that sits on really old Hardware. 1 Sun Sunfire V60x with a single 3.0ghx Xeon FSB 400 512kb cache with 6gb of RAM running RHEL 4 (32bit) The table space and ...
1
vote
2answers
645 views

Share SCSI DAS enclosure (vtrak m210p) between multiple servers?

I've got a Promise vTrak m210p subsystem. It supports LUN mapping & masking, and has two SCSI channels (2 VHDCI ins & 2 outs on rear of device). I believe this question will probably apply ...
1
vote
0answers
23 views

Transfer cacerts file to another das

I was wondering if its possible to transfer the cacerts.jks file to another glassfish DAS machine? The idea is to synchronize both das machines without having to import every certificate manually. ...
1
vote
0answers
178 views

DroboS causes Windows Server 2008 box to hang on boot

I'm running a DroboS connected via eSATA and the machine will not boot past the initial Windows graphic loading screen no matter how long I let it run. Windows Server 2008 x86 connected via an ...
1
vote
1answer
525 views

Software to repliacte data in a Cluster Shared Volume in real time from DAS attached to Server 2k8 R2 HyperV cluster to an identical setup?

Are there any software solutions that will be able to handle replicating the data from one SAS based DAS (a Dell MD3200) attached to two R410 servers running clustered Server 2008 R2 Hyper V instances ...
0
votes
1answer
3k views

HP P2000 G3 MSA (SAS) - Configuring 2 Hosts to use the same volume (cluster)

I have got 2 x HP DL360 G7 servers with the sc08 controller cards installed, and dual controller P2000 G3, the cabling is a single cable from each server to the controlelr cards (using SAS port 1 on ...
0
votes
1answer
194 views

Advice on MSA70 Storage and MSA2324fc

I am looking into storage for our network, due to budgets am looking at both DAS and SAN solutions but I don't have any experience with HP storage solutions so just got a few questions. On the ...
0
votes
2answers
405 views

1 Storage with 1 “big” partition + 2 servers

I need to setup an "cold fail over" to our database server. Since we cannot run an real HA because an software issue, I'm planning to connect 2 server to a single storage. If main server fails, I just ...
0
votes
2answers
1k views

Are there any direct attached NAS devices?

This may seem a bit counter-intuitive, but I'm looking for a NAS device like the QNAP that can be direct attached to a server. The rationale here would be backup speed. I would like to backup via ...
0
votes
1answer
102 views

Can I have my storage server running in a VM?

I'm trying to find a way to minimize the amount of space the VM server and storage take up while being able to use ZFS as a file system. I've come up with either using xVM on Solaris or using ...
-2
votes
1answer
57 views

Something new for me in Windows server 2008

what does Direct Attached Storage DAS mean in windows server 2008. what does it do or can it be useful for a user using a server any ideas?
-2
votes
1answer
239 views

How to setup Load Balancing on DAS (Dell MD3220)

We have a Dell MD3220 attached through two 6Gb/s HBA controllers. We want to enable Load Balancing to improve performance. What at the requirements and steps?
-3
votes
1answer
67 views

Driver not visible from the OS in DAS

While doing the OS scanning the driver is not visible, causing me to be unable to make a backup (which is offline). The server is directly attached to the SCSI tape library (DAS environment). What ...