Tagged Questions

RAID solution with hardware assistance. RAID parity calculations can be performed by either the main CPU, or by a separate processor on the RAID controller card.

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1
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1answer
750 views

What's the difference between Adaptec's “maxCache” and “Hybrid RAID” technologies?

http://www.adaptec.com/en-us/_common/maxcache/ http://www.adaptec.com/en-us/_common/hybrid-raid/ They sound similar, but there's no detailed description of how either of them work.
0
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4answers
330 views

What RAID Level Should Be Used

I am working on a server build project for work and have inherited the following items that I need to figure out the best way to handle and configure. 2 of these: I/O Crest SY-PEX40008 PCI-e SATA ...
1
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1answer
162 views

HP StorageWorks RAID 50: Volume size on creation is not precise enough

I've got a HP MSA2312i with 24 Hard drives. I created a RAID 50 virtual disk. That makes me a total of 11 TB of available space. I want to create a 500GB volume (0.5 TB). When I want to create a ...
6
votes
2answers
3k views

How long should rebuilding 250GB take? [closed]

In a PowerEdge 1900 have I a hardware RAID 5 of 5x250GB disks + 1 hot spare 250GB. Disk 2 have errors, so I forced it offline in the raid bios to replace it. Now it have been rebuilding to the hot ...
3
votes
1answer
260 views

“Transparent” SATA RAID Controllers [closed]

I'm looking for a true hardware SATA RAID controller that can do levels 0, 1, and 5 and is, for a lack of a better term, "transparent" to the OS in that it requires no software drivers whatsoever. ...
1
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1answer
1k views

HP Smart Array p410i rebuild percentage not correctly working

I have a HP Poliant with a p410i and when I rebuild my raid 5 with a quick remove and insert to test the rebuild percentage goes up to 10% and then jumps to 92%. I continues up to 100% and the Array ...
6
votes
1answer
584 views

Areca - expanding a raid by swapping out disks for larger ones

What I am looking to do is, one by one, replace the drives in my current raid array (in a 1680i). After the drives are replaced by their larger counterparts, I want to do an online expand of the ...
1
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1answer
209 views

Perc 4 Configuration - Drives not showing up

Hello I am trying to configure raid on a PERC 4 running in a PowerEdge 1850. When I go into the bios configuration for the raid controller the drives I have attached are not present. Specifically ...
1
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1answer
1k views

Hard Drive (Failure) IBM x336, Diagnose and Fix RAID-1 & Configure IBM Software

A year ago I was given an old IBM x336 server to run some personal projects on, now I knew nothing about servers at all so just put some more RAM in, wiped and disks and installed Ubuntu Server on it ...
0
votes
1answer
2k views

how do I configure the archttp software for email notifications from an Areca 1880i RAID card

I have a 64-bit CentOS 6.0 Linux computer with an Areca 1880i RAID card. The RAID card has its own ethernet port but it is right now not connected to anything. Instead of using that ethernet port for ...
5
votes
4answers
8k views

Is this a critical RAID error?

If I do the following /opt/MegaRAID/MegaCli/MegaCli -LDInfo -Lall -aAll -NoLog > /tmp/tmp /opt/MegaRAID/MegaCli/MegaCli -LDPDInfo -aAll -NoLog >> /tmp/tmp then I see these errors ...
0
votes
1answer
3k views

how to do a kickstart installation of CentOS 6.0 on a Areca 1880i hardware RAID card

I have a server with this hardware two Intel Xeon E5620 CPUs Areca 1880i 8-port SAS RAID PCIe 512MB cache Areca Battery Backup Module 5 pcs Hitachi Deskstar 7K3000 HDS723030ALA640 64MB 3TB and ...
2
votes
2answers
4k views

Areca 1880i RAID card doesn't initialize: “Waiting for F/W to become ready”

During a kickstart installation (Centos 6.0) of a server having this hardware: Areca 1880i 8-port SAS RAID PCIe 512MB cache Areca Battery Backup Module 6 Hitachi Deskstar 7K3000 HDS723030ALA640 64MB ...
0
votes
4answers
3k views

How long should a RAID Reconfiguration take? (Adaptec 6805)

I'm experimenting with various RAID configurations of a new Adaptec 6805 (not the 'E' model) Attached are 8x Hitachi 5400RPM 2TB SATA 6Gb Drives using the miniSAS to SATA cables provided. I created ...
0
votes
2answers
207 views

How to determine the real disk size of an hardware RAID?

I have a Fujitsu Primergy TX200 S3 server running Win Server 2003 R2 SP2. It has hardware-RAID using an LSI Logic MegaRAID SAS 8300XLP RAID Controller. I simply want to find the size of each disk in ...
2
votes
2answers
244 views

If performance is not a issue software vs hardware raid

If performance is not a issue what makes hardware raid better then software raid. so far i have drawn the following conclusions. Hardware raid is limited to the raid controller if that pacs up you ...
3
votes
1answer
727 views

RAID controller question: NVDIMM or not?

I am in the market for a new RAID controller for a Dell server, and I have a choice between "PERC H700 512mb Cache" and "PERC H700 512mb NVDIMM Cache". There is a $200 difference between the 2 cards, ...
2
votes
1answer
281 views

Virtualisation mini-datacenter setup?

We have (gradually) built up a simple network of servers which I intend to use as a virtualisation stack(?). To illustrate the hardware that we have at our disposal please see the following image: ...
0
votes
2answers
195 views

installing microsoft server 2008 on RAID drive

Using RAID 1 on a HP G165 G5 server and trying to install windows server 2008, however right at the install screen the windows installation wont find any hard drives. Ive tried installing HP 4/8 ...
4
votes
4answers
3k views

Is it normal for a SAS drive to have a few bad blocks, or should I replace my drive ASAP?

I have a drive—part of a RAID 1 mirror—that has two bad blocks. Adaptec Storage Manger e-mailed me when it detected the blocks. It shows 4 medium errors for that drive, but state is still “optimal”. ...
3
votes
1answer
4k views

How do I configure hardware raid in a Poweredge 2850?

I just bought a Dell Poweredge 2850 from Craigslist and for the most part I'm happy with it's $300 price-tag, but I cannot figure out where to configure the embedded hardware raid... I've seen online ...
3
votes
1answer
608 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 ...
0
votes
1answer
143 views

Software RAID to hardware RAID, can it be done?

Can it be done ... well. (For the record, I did not set this server up.) In my server there are 4 disks. 3 of them are in a software RAID5, and 1 has the OS installed. I want to buy a RAID ...
0
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4answers
1k views

How to (hardware) RAID 10 on Ubuntu 10.04 LTS with 4 drives and motherboard with RAID contoller

I have 4 500GB hard drives. I set up a RAID 10 in BIOS, much like shown here: http://www.supermicro.com/manuals/other/RAID_SATA_ESB2.pdf Then I followed these instructions: ...
1
vote
2answers
297 views

Can I do a Raid 5 with a SAS6i/R?

I have a PowerEdge 2970 server with a: SAS6i/R Integrated Controller for PowerEdge 2950/2970, x6 Backplane ...
0
votes
1answer
358 views

Windows Server 2008 Core R2 Raid status

I would like to ask if there is a way how to figure out the RAID status on a running W2008SR2 Core machine. I have ICH8R Intel Controller. RaidConfig utility from intel doesnt work just like CMDTool2. ...
3
votes
2answers
637 views

Replacing a Hard Disk in RAID 5 Array with Newer Version

Recently, 1 out 4 disks in my RAID 5 array failed. I searched for a replacement part and learned that only a newer version of the hard disk is available. This "newer" version has the exact same specs ...
3
votes
2answers
3k views

Replace faulty Dell PERC 5/i controller without losing data

Is it possible to replace a 5/i controller without losing the data on the array? Can I import this as a foreign configuration? Any "gotchas" or tips to make this smoother?
2
votes
1answer
261 views

Slipstreaming Drivers for a PCI Controller Card into Ubuntu Server 10.04 Installation

I'm setting up a backup server with RAID10. The PCI Controller Card is new to the computer so the drivers need to be installed for the OS install to recognize it. I went through this process ...
1
vote
1answer
553 views

Fiberchannel SAN RAID is slow (DS4100)

I have set up two DS4100 SAN linked with fiberchannel. I've set up multiple RAID configurations: RAID10 spanning 4 disks in each SAN, a few RAID5's. (hardware RAID handled by DS4100) I'm running ...
3
votes
1answer
227 views

Set device offset in Linux due to failed hardware RAID?

I have a failed hardware RAID card. This card had two drives in a RAID-1 mirror. Plugging one of the drives into the motherboard shows no partition table. Using a program like testdisk, I can see ...
1
vote
1answer
655 views

HP ProLiant DL 180 G5 - Can't see disks

I'm currently learning how to manage the storage of a HP proliant dl 180 g5. It has a Smart Array P400 RAID controller which works fine. So I've actually the problem, that I can't see disks which are ...
1
vote
1answer
216 views

Windows Software Raid 0 over hardware raid 1 does this equal a hybrid 1+0?

I've got a server running windows 2008R2. The hardware controller can only do Raid 1 or 0 and it's hotswappable. I have 4 drives (hot swappable hardware), each pair is mirrored (raid 1). I'd like to ...
2
votes
3answers
257 views

Which RAID5 configuration is faster?

I have RAID controller with 24 SATA disks. Which configuration is faster? One RAID5 with all disks. Six RAIDs with 4 disks in each group.
1
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3answers
291 views

Drive configuration for small virtualization

I do IT infrastructure support primarily for small businesses (up to ~50 users). The past few years I have been doing some server virtualization for situations that don't require a second physical ...
0
votes
2answers
721 views

How do I get Busybox Linux/ESXi 4U1 to recognized expanded RAID 5 disk array?

I'm in the process of upgrading a pair of physical servers to 3 virtual machines. The 2 physical boxes (HP DL380 G5 with Smart Array P400 disk controller) will run VMware ESXi 4 update 1. Each ...
6
votes
5answers
7k views

Poor read performance on Dell Perc H200 RAID10 with (4) 1TB 7200rpm 64MB drives

I am seeing only 50MB/s reads: ensnare@box:~$ sudo hdparm -tT /dev/sda [sudo] password for ensnare: /dev/sda: Timing cached reads: 4592 MB in 2.00 seconds = 2296.48 MB/sec Timing buffered disk ...
0
votes
1answer
897 views

Raid1, one disk displaying SMART errors:

I have a HP Pavillion machine, and I'm using the RAID controller built into the motherboard (H-RS880-uATX, some consumer grade RAID controller, not sure who). I got a slew of event log errors from ...
1
vote
2answers
293 views

Which hardware RAID 5+ cards have a true separation between Host CPU and controller CPU ops?

For example, Windows talks with the 3Ware card as if it were a hard drive, and the 3Ware card takes care of writing content to the raid as an asynchronous process. This frees up the CPU from disk ...
1
vote
3answers
236 views

Hardware vs Software Raid: How to choose between 2 example server specs

I am currently looking up servers on hosting companies. I have finally chosen 2 reliable and tested companies, but their specs vary. Company one (dedicated server): CPU: AMD Athlon 64 X2 5600+ ...
1
vote
1answer
274 views

SAS Raid Controller

I am working with a sys admin on a DELL PowerEdge 710. The sysadmin purchased the server before I was advised with no cache on the raid controller, we are running a SQL server and needed to have ...
1
vote
1answer
1k views

Recover data from PERC 6/i RAID5 array using software RAID

I have 4 hard drives from a RAID5 array from a Dell server that suffered physical damage to the PERC 6/i RAID controller card. The 4 disks themselves are undamaged and I've created 4 disk images ...
1
vote
2answers
782 views

Hardware RAID controller set to 256kB stripe size, but XFS to 4k block size

Is this configuration ok? I've read that the stripe size should match the block size. I am mostly storing 8-30GB single files that are read sequentially. What should I adjust, and how? Ubuntu ...
2
votes
2answers
2k views

Perc 5/i and 3TB drives?

Any way to get a Dell Perc 5/i controller to recognize 3TB drives?
0
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2answers
221 views

New hard disks for Xserve RAID

We have an Xserve in our office: MAC OSX 10.4 2 X 2Ghz Dual Core Xeon 2GB RAM It has 4x250GB drives in it and we need to expand. What I am wondering is: Are we limited to what sort of drives we ...
1
vote
1answer
215 views

Recommended Development / Build Server RAID Configuration

I've done a lot of research on RAID configurations; Wikipedia, questions here on serverfault, articles, on random websites: RAID5 vs RAID10; Build Server Capacity Planning. From my understanding, it ...
7
votes
2answers
1k views

Can enabling a RAID controller's writeback cache harm overall performance?

I have an 8 drive RAID 10 setup connected to an Adaptec 5805Z, running Centos 5.5 and deadline scheduler. A basic dd read test shows 400mb/sec, and a basic dd write test shows about the same. When I ...
2
votes
3answers
3k views

Alerting when a RAID Array disk fails locally on VMWare ESX or ESXi System

With ESX and ESXi, we recently had two systems where that the boot partition became degraded due to a failed disk. The only alert we managed to capture was the visual alert on the Dell servers. We ...
0
votes
3answers
204 views

RAID Planning for server

I'm trying to do some RAID planning, and the only RAID systems I've worked with in RAID-1. I'm going to be setting up a RAID-10 server. Could it make sense to have the primary hard drive with a ...
1
vote
1answer
565 views

Does 3ware 9550SX SATA RAID controller work with WD 2TB caviar black edition drives?

I have 4-years old 3ware 9550SX SATA RAID and i want to upgrade drives to 2TB. Official LSI HCL says that they support only enterprise-level disks and the latest HCL speaks only about 1TB drives. ...