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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185 views

Is file system alignment required on hardware-raid with SSDs?

We are building a raid-10 with LSI 9260-4i + 4 x Intel DC S3500 SDDs. Partition alignment From what I understand I need to start fdisk with -H32 -S32 or Ted T'so variant with -H224 -S56 in order to ...
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2answers
156 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 ...
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1answer
85 views

Using hpacucli to disable auto logical volume disabling when failed

By default, when a physical drive fails in an HP RAID array, the controller takes the logical volume offline to prevent data loss, instead of taking it in "degraded" status like LSI/Adaptec does and ...
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1answer
385 views

Adaptec RAID array was not detected after updating the kernel?

Continue from this topic, the newer kernel booted successfully but it doesn't see my sdc - which is a hardware RAID array (level 10). I'm sure the aacraid module is loaded: # grep aacraid ...
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3answers
4k views

How to replace failed drive in RAID 5 array in HP DL380 G4 server

Sorry for not providing more information when I previously posted this question. More detail is provided below. Any feedback would be welcome. I have a HP DL380 G4 2U server which has 6 drive scsi ...
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1answer
221 views

internal RAID (on PCIe 3.0) versus external Thunderbolt RAID like Pegasus R6

I want to build up a new server-config in a small SOHO environment for some virtual machines (VmWare Workstation), like Firewall/VPN or Win8-WS for external access, etc. Some VM’s will be heavily ...
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1answer
157 views

RAID 50 24Port Fast Writes Slow Reads - Ubuntu

What is going on here?! I am baffled. serveradmin@FILESERVER:/Volumes/MercuryInternal/test$ sudo dd if=/dev/zero of=/Volumes/MercuryInternal/test/test.fs bs=4096k count=10000 10000+0 records in ...
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1answer
165 views

sqlserver 2005 sp3 poor performance and scheduled job failing

When executing the Microsoft SQL Server 2005 best practices analyzer, I am getting some reported as follow: The Outdated system driver [C:\WINDOWS\system32\ntoskrnl.exe] of System that can cause ...
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1answer
646 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.
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1answer
158 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 ...
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1answer
913 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 ...
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1answer
196 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 ...
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1answer
206 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 ...
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1answer
255 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 ...
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1answer
766 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 ...
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1answer
100 views

Video recording server configuration (in detail) [closed]

You have answered my question, but I now have more detailed ones that I need answered. In short, I need a server that is high on HDD capacity to record RTP streams from many IP cameras. I asked my ...
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1answer
546 views

Will Adaptec raid 2405 card work in Asus Crosshair Formula IV MOBO

Will this PCIe 8 lane Raid card Adaptec 2405 Work in this Motherboard Crosshair Formula IV Having never seen a PCIe slot Im not sure and just want to check before ordering. TIA UPDATE: What ...
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1answer
781 views

Do I need DELL OpenManage to generate snmp traps on RAID degradation?

I need to setup surveillance on all our servers to spot any RAID degradation in time. However, not all of our servers have OpenManage installed, and since they are in production I don't like the idea ...
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1answer
462 views

Degraded RAID 5 volume not showing up in seperate host

We have a (very) old server with 3 x 9gb SCSI drives in a raid 5 configuration. After some power issues the server came back up with a degraded logical drive according to the cards bios. The card ...
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2answers
246 views

Raid Anaylsis Software

Are there any great RAID analysis software tools out there?
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1answer
76 views

LSI MegaRAID SAS 9261-8i: Disk isn't recognized after replacement

I've got a Supermicro Server with an LSI MegaRAID SAS 9261-8i Raid Controller inside. There were 3 Disks attached to the controller which were configured as RAID5 array. One of the disks failed ...
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0answers
46 views

running commands on physical drives on different backplane with megacli

So when I run "MegaCli64 -PDlist -aALL -NoLog | egrep 'Slot|state|Inquiry|Enclosure'" to grab a list of disks and their status. I can see a total of 36 disks. The issue is that they have the same slot ...
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0answers
44 views

Scientific Linux: RAID5 unaccessible after netboot by mistake

A server running old scientific linux 6.0 suffered damage from an enabled netboot during reboot by trying to load some crap from an application server in the same subnet (I saw him stuck somewhere in ...
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0answers
99 views

best setup for fast sustained streaming (sequential?) disk writes

i am setting up a high speed/high resolution scientific image acquisition system. i need data write rates of ~1 GB/sec sustained for ~1 hour. i don't have experience with raid, but my plan is to ...
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335 views

HP P410 “Parity Initialization Status: Initialization Failed” How to fix?

I'm using HP P410 raid card with BBU with 12 x 3TB drives on RAID50 After a power outage at the datacenter, the hpacucli shows this: Parity Initialization Status: Initialization Failed However, all ...
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0answers
73 views

three disks with ECC errors on 3ware raid in two weeks

I have a server I maintain for a client, It's an Intel Nehalem based computer, so not new, but in working order. It has a 3ware 9650SE-24M8 card with 20 drives attached and 4 empty slots, configured ...
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0answers
65 views

Debian Squeeze not detecting Highpoint RR2710 Raid SAS Card during install

I have an HP DL120 G7 and have a Rocketraid Highpoint 2710 Raid SAS card with 4 drives. Have built a RAID 5 with those at the Raid Card Bios, and have tried to install Debian squeeze v6. The Raid card ...
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1answer
605 views

HP SmartArray P212 disabled, cache module not attached

I have a DL180 G6 server with Smart Array P212 RAID controller. The server runs under Ubuntu. After an upgrade from Ubuntu 10.04 to 12.04 utility hpacucli (ver. 8.50-6.0) stopped working. The error ...
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0answers
186 views

Linux CLI program to verify/control nVidia hardware RAID?

I have a server with a Supermicro motherboard that has an nVidia RAID controller on board. When I boot up, I can hit F10 and see/modify the RAID settings. However, I don't want to reboot this server ...
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0answers
165 views

Possible bad raid card / hard disks (LSI 9261-8i)

I am in a bit of bad spot at the moment, i have a dedicated server hosted by someone else, it has a LSI 9261-8i raid card installed, attached is: 3x300GB SAS 15K rpm disks (in RAID5) 5x2TB SATA ...
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145 views

Can I use tw_cli migrate to grow a RAID10 unit where the drives for that unit were each replaced one by one with larger drives?

Can I use tw_cli migrate to grow a RAID10 unit where the drives for that unit were each replaced one by one with larger drives? (And the array was rebuilt after each replacement operation.) I am ...
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0answers
358 views

Grub2 won't install on fresh Ubuntu 12.04 LTS Server installation

I have a hardware RAID 1 which seems to be recognized find by the Ubuntu installer. I choose the "Entire Disk - Guided" partition strategy and accept the defaults, writing them to disk. When it ...
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0answers
303 views

3ware 9550SX(U) Not appearing to OSs

I have a 3ware 9550SX(U) that doesn't show up to OSs. This is strange because LSI says Openfiler(Linux) has native drivers in the kernel. Also when Int 13 catches I get a list of the 6 Drives I have ...
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0answers
626 views

Slow disk transfer rate

I have problem with slow disk transfer rate. It's static files server for our website. I was making backup of data and noticed that tar is very slow. So I did hdparm -t and... hdparm -t /dev/sda3 ...
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2answers
261 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 ...
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4answers
318 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 ...
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4answers
2k 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 ...
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1answer
128 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 ...
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2answers
639 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 ...
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2answers
474 views

RAID Spare Drive on ProLiant G6 Server

I have a question about the Spare Drive on an HP ProLiant Raid Disk Array. Does the Spare Drive have to be greater or equal the size of the largest RAID drive? For example (is this configuration ...
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3answers
166 views

How long to install a new RAID 1 pair in linux using hardware RAID?

I need to install a pair of 1Tb disks into a server that has a hardware RAID card. How long is it likely to take to configure the RAID controller - sticking the disks in is only a 5 minute job, but ...
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2answers
297 views

Server drives: 2.5“ SCSI less reliable than 3.5”?

Just had an HP 2.5" 146GB SAS 10k drive fail on a RAID5 array after about 2.5 years. It made me wonder if this was a fluke or an indication that 2.5" drives are less reliable than 3.5" SAS drives. ...
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3answers
443 views

Convert RAID 5 to RAID 10 without data loss

I have a Windows SBS 2011 server on a Dell R610 with RAID 5 configuration [3 disk]. Is there a way to convert it to RAID 10[4 or 6 disk] without losing anything or needing to re-install the whole OS ...
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2answers
391 views

System with RAID 5 array, plus additional drive for OS

I'm in the process of building a NAS system - It has 8 1TB drives, which I am currently building as a RAID 5 array. It's using a 3ware hardware raid controller. I've also installed a single 250gb ...
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2answers
61 views

Does connecting SATA drives to multiple SAS ports make a difference in throughput?

I have four 2 TB SATA II drives that I intend to connect to an LSI 8888ELP card. The card has two Mini SAS ports, and I am going to connect the drives with an SFF 8087 to 4x SATA breakout cable. But ...
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2answers
56 views

Missing hard drive on df -H command on Centos 6.4 [closed]

I have 2*1000GB hard drives + 60GB SSD. When I'm running df -H I'm getting "wrong" information about the server's hard drives. The output # df -H Filesystem Size Used Avail Use% ...
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2answers
220 views

Raid 1 and Latency

I am aware that RAID comes with certain write penalties, etc and that varies at different levels. I am trying to figure out how latency is affected in RAID 1. From my SAN, I can look at the number of ...
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2answers
412 views

move raid hard drives between different servers, preserving data [duplicate]

Possible Duplicate: Move raided hard drives between identical servers, preserving data I'm a server beginner working with a Sun x4600 and an IBM x3650. In the event that one of them dies, I ...
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1answer
148 views

Move raided hard drives between identical servers, preserving data

I have a raid array of hard drives in a Sun x4600 that need to be moved out, and another Sun x4600 ready to accept those hard drives. The problem is: in my limited experience with servers, it seems ...
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2answers
760 views

Dell PowerEdge 1950 how use “raw” disk instead hardware raid Perc 5/i

I have Dell PowerEdge 1950 with hardware raid Perc 5/i. I want use software raid md/lvm. Is any way to totally disable this raid and see "raw" sata disks? I play alot with BIOS , enable SATA, ...