1
vote
1answer
23 views

Partitioning SSD and HDD in Linux NAS

There is a computer with four 2.7 TB hard disks, under control of Intel Rapid Storage Technology. And one 120GB SSD. We need to use it to store some data that we are collecting and computing. I think ...
0
votes
2answers
99 views

Why is my RAID1 or RAID10 virtual drive (6 SSDs) not significantly faster than a single SSD?

I'm trying to figure out why the performance of a Virtual drive built from 12 SSDs is not really faster than a single SSD drive. The Server is a IBM x3650 M4, two Xeon E5-2643v2 130W 6C 3,5GHz. The ...
10
votes
3answers
957 views

Should I avoid putting two SSDs in a RAID1 configuration due to performance degradation?

I have a workstation system that will have two 64GB industrial SSDs, and the plan is to have both disks in a RAID1 configuration for redundancy which is set up in the kickstart. The system will be ...
2
votes
2answers
221 views

Combining SSD and HDD in HP dl380p?

I´m planning to buy a dl380p with 25 sff slots with 2 ssd:s raid 1 and 10 hdd:s raid 5, having room for 13 more hdd:s in the future. Is this possible or do I need two raid cards?
3
votes
1answer
133 views

SSD Software RAID Alignment Necessary?

Is it necessary to have the partitions that makeup a software RAID 1 array be aligned? This guide states "Software RAID: Although one needs to pay attention to correct alignment here as well, ...
8
votes
4answers
726 views

SW SSD Raid 1 over HW RAID 10

A provider(data center) recommended I go with 1TB SSDs in a software RAID 1 over HW RAID 10 with mechanical drives. Their quote: Typically SSDs are most reliable than RAID cards and since you ...
2
votes
1answer
168 views

Setting I/O scheduler for SSD based RAID array on EC2 instances

I created a RAID array using the 2 local SSD drives on a EC2 c3.4xlarge instance. # mdadm --create /dev/md127 --level=0 --raid-devices=2 /dev/xvdf /dev/xvdg # mkfs.ext4 /dev/md127 # mkdir /data # ...
0
votes
1answer
272 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 ...
0
votes
1answer
71 views

JBOD or RAID on a streaming server setup

Currently my setup is 1 main server which holds all the mp4 videos and 3 other servers which holds portions of this video. The process is: when a user uploads a video, it is stored into the main ...
0
votes
3answers
222 views

Does software RAID-0 really improve performance?

I am going to lease a server and I have two options, SATA or SSD, I decided to save the money and go for the SATA option. But I do not need all that storage they are giving me! So I thought MAYBE I ...
3
votes
1answer
591 views

flashcache with mdadm and LVM

I am having trouble setting up flashcache on a system with LVM and mdadm, I suspect I am either just missing an obvious step or getting some mapping wrong and hoped someone could point me in the right ...
1
vote
2answers
397 views

SSDs, Hardware RAID, and TRIM

I was told by my datacenter that all HW raid, specifically the LSI 9260-4i hardware RAID controller, does not support SSD TRIM command. My question is, are there severe longevity/speed issues due to ...
0
votes
1answer
188 views

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 ...
-2
votes
2answers
64 views

Server Upgrade and Data migration [closed]

Hello, I'm migrating a server here is the detail of both server, Copy from Location Current Server have 450GB of Data in home drive, which is critical and must be copied.Current Server have 7200RPM ...
2
votes
1answer
672 views

Should I enable “Patrol Read” on SSD drives?

LSI, Intel and Dell RAID controllers (perhaps others) have a "Patrol Read" feature to try to spot when a drive is failing before it completely fails. LSI seems to disable patrol read on SSD by ...
1
vote
1answer
64 views

Removing and re-adding a raid drive

Lets say I remove a drive from a RAID array on a HA server for a period of time then re-add it. Is there a way to limit the rebuild to a diff of what has changed since it was pulled, or does it have ...
2
votes
1answer
155 views

Concerns of simultaneous failure of SSD Raid1

Since SSD's have a write limit requiring wear leveling one would assume that all things being equal 2 identical SSD drives would wear nearly identically if they mirror data writes. When one drive ...
24
votes
5answers
2k views

Do I need to RAID Fusion-io cards?

Can I run reliably with a single Fusion-io card installed in a server, or do I need to deploy two cards in a software RAID setup? Fusion-io isn't very clear (almost misleading) on the topic when ...
2
votes
1answer
173 views

Performance of Linux software raid-1 across SSD and HDD (partitions)

How does Linux software raid-1 work across disks of dissimilar performance. Would a raid-1 across ssd and hdd partitions give me a mirror of the ssd contents while not impacting the read speed? I ...
0
votes
2answers
925 views

Software for RAID Failure Alerts?

I have two 256 GB Samsung 840 Pro SSD disks in a RAID 1 array. I would like to receive a notification if one of the disks in the array fails. Can anybody recommend an application I can install on the ...
0
votes
1answer
410 views

Which alternative is most performant (raid, ssd, 15k rpm disks)

I'm looking at the DELL PowerEdge™ R720 from Hetzner. This server has a Dell PERC H710 8 Port SAS/SATA 6GBit/s raid controller. I have the choice between: 3 x 600GB SSD (MLC SATA 3Gb/sec) 6 x ...
4
votes
2answers
498 views

Maintenance (TRIM) of SSDs in HW RAIDs

I have 2 ARECA 8040 HW-RAIDs, with 8 SSDs each. One is RAID10 with Intel 520 SSDs, the second is RAID5 with Samsung 840 SSDs. Both are connected to the Server with one shared LSI Logic / Symbios Logic ...
1
vote
1answer
154 views

100% SSD usage Linux

Every 20-30 seconds my HDD usage goes to 100% (iostat). iotop is showing that [flush-8:0] is using 99% HDD during these times. In between HDD usage is 1-10%. iostat output: 04/22/2013 08:58:44 AM ...
0
votes
1answer
241 views

8kb block sizes as it relates to different storage layers

I have a PCIe SSD card that uses 8kb block cells. It supports "Virtual Controllers" that can split this drive in half and create LVM RAID0 with 8kb stripe size. On top of that I install a file system ...
0
votes
1answer
390 views

Dell H710P, Non-Dell SSDs, and RAID Failures

As long as a non-Dell drive is recognized by the H710P controller, and I'm able to set it up in a RAID, will RAID errors with regard to the non-Dell drives be reported? I setup a RAID10 (16 x 256GB ...
0
votes
0answers
185 views

RAID10 (4x SSD) system is super slow for 'dd' and 'find' commands

I have configured two servers each with 32 GByte RAM, 2x Xeon 2.4 GHz, 4x 480 GByte Intel SSD on a LSI MegaRAID SAS 9261-8i controller. They should be identical, however one of them has a very poor ...
0
votes
0answers
278 views

Intel S2600CP4 SSD RAID 'corrupts' after a few boots

We've attempted to build an SSD RAID 1 using Intel server motherboards and SSDs a few times, using current and previous gen Intel boards. We can normally get through installing Server 2008 R2 x64, ...
1
vote
1answer
576 views

RAID 10 over RAID 5 when using SSDs

I am considering implementing an iSCSI shared storage array using SATA SSDs instead of the 15k RPM SAS drives we normally purchase. We normally use RAID 10 because of spindle contention with the ...
2
votes
1answer
882 views

RAID10 (16 x 256GB SSDs) in PowerEdge R720 for Build Server

I'm trying to put together specs for a top of the line Dell R720 (running Windows Server 2008R2) build server (C#), and I'm unsure what the best hard drive / RAID setup would be. Our space ...
-3
votes
1answer
201 views

Raid 1/0 SSD vs 2 x non-Raid SSD [closed]

I have a question about speed performance with two separate SSD drives comparing them to RAID mirror array. I do not like idea to setup RAID 0 with 2 x SSD drives because of high risk of data loss, ...
0
votes
1answer
706 views

ZFS SSD Trim and Software Raid 5

I am trying to find if the ZFS filesystem has added support for Trim to Raid 5? I am setting up an SSD array in Raid 5. I also would like to know if there is any good software raid 5 alternatives to ...
5
votes
1answer
366 views

Linux software RAID5 on SSD. One SSD 40% more worn out than the others

We have a 6 SSD, RAID5 volume. The SSD disks we are using are Crucial M4-CT512M4SSD2 firmware 000F. We write 100 ~ 200GB data through MySQL InnoDB to the volume daily. The RAID5 volume is only used ...
-2
votes
2answers
2k views

RAID 10 vs RAID 1 SSDs [closed]

I'm considering moving a large database from mechanical disks to SSDs. My initial instinct was to go for RAID 10, but further research suggests that this configuration can significantly reduce the ...
0
votes
2answers
181 views

New to Windows Server 2008, can i change system raid

I have bought Windows Server 2008, but I am not sure if I should install it now or wait until I get my third system disc. I currently have 2x 32gb SSDs. I am going to buy another disc, because the ...
1
vote
0answers
164 views

Adding SSD boot disk to machine running RAID 10

I have a server (dev rig) that runs Windows 2008 R2 and boots from a RAID 10 setup. Now I want to add an SSD disk that will contain Windows 7 (could be dual boot, but dont plan on salvaging the ...
2
votes
3answers
1k views

What would happen if I did a raid on a SSD and an HDD?

I am building another server (cheap) and would like to go with a 256GB SSD drive for my boot and data. This will be enough for my needs, but just having one SSD scares me for a couple of reasons. If ...
1
vote
3answers
1k views

How to use 2 SSD disks for best performace?

I am going to format 2 120GB Intel 320 SSD to be used for a high traffic Drupal server. The server had Xeon E1270 CPU and 32GB RAM. I'm using Debian Squeeze 64 bit. Here are my questions: What ...
0
votes
1answer
264 views

Server Config Software Raid Slow Read

I have 6x WD Caviar Black 1,5 TB in Software RAID 10 / 1 / 0 (Centos 6.2 / mdadm) cat /proc/mdstat Personalities : [raid10] [raid0] [raid1] md0 : active raid1 sdf2[5] sda2[0] sdb2[1] sdd2[3] sdc2[2] ...
0
votes
1answer
1k views

Expand PERC 6/i RAID 10 SSD array, or add new VD for SQL Server?

On a Dell R710 server running Window Server 2008 R2 there are currently 4 50GB SSDs in a RAID 10 array, and I'm adding 2 additional 50GB SSDs. This server runs SQL Server and not much else. If these ...
4
votes
1answer
561 views

Write-Back and Write-Through for SSDs

Are there any special implications of Write-Back vs Write-Through that should be considered when creating an SSD raid array?
0
votes
1answer
234 views

configuration for max read throughput on ssd: pcie vs sata vs raid

I'm looking to configure a storage setup, using ssd's, that will deliver the fastest read throughput on large (2+ GB) files on a 24 core (12 physical core) system. The data is static for the most ...
4
votes
2answers
889 views

Can I use an SSD as Cache to a NAS?

There is a NAS with Raid 10 that holds resources. At a time, around 24 machines try to access the same resource (3d rendering in a render farm). Although the network is 1Gbps and NAS is fast, the ...
0
votes
1answer
185 views

SSD RAID 0 Setup for database application. What results should I look for?

I guess for database applications Random 4K Read/Write values of the SSD should be the one which should be checked first. The question is how many queue depth should I check? As far as I see Random ...
5
votes
7answers
2k views

setup lowcost image storage server with 24x SSD array to get high IOPS?

I want to build let's name it a lowcost Ra*san which would host for our social site the images (many millions) we have 5 sizes of every photo with 3 KB, 7 KB, 15 KB, 25 KB and 80 KB per Image. My ...
3
votes
3answers
604 views

Using SSD drives in a raid in an operation involving little to no deletes

From what I've been able to understand when reading about the case with Solid State drives and raids, the problem is that TRIM cannot be used for them in a raid configuration, thus, resulting in the ...
4
votes
1answer
118 views

RAID Mirror with difference HD types

Can a SSD and a non SSD be setup in a Mirrored raid configuration (non software)?
3
votes
1answer
1k views

Is TRIM possible on SSD disks in RAID 1?

I am going to build a new server to handle a high-traffic php/mysql site. I am going to use SSD disks to benefit from fast random read performance but really got confused about choosing the right SSD ...
3
votes
1answer
588 views

2x SSD's in RAID1 for MySQL server

I'm in need to upgrade my MySQL machine, as currently I am running 2x SATA 7200rpm drives in RAID0. This of course is quite dangerous incase one of the drives fails. As I do not need too much storage ...
1
vote
2answers
221 views

SSDs in high read/write environment

At the minute, we host VPSes for many customers using standard RAID10 setups using spindle hard disks. We are thinking of trying a new experiemnt: SSD based VPSes in RAID10 arrays. My knowledge ...
4
votes
1answer
3k views

How to over-provision an Intel SSD RAID Array via the Dell H700 PERC RAID Controller

I would like to set up a RAID10 array of 6 Intel SSD 320 SSDs, but over-provision them to enhance their performance and duration as per this PDF: ...