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Questions tagged [raid-controller]

Raid controller is a device to manage physical disks

Raid controller is a special device used to manage multiple physical disks and present them as logical units. It implements hardware raid. It can be referred to also as disk array controller.

Disk array controllers provide:

  1. Backend interface to communicate with the controlled disks such as SATA, SCSI, etc..
  2. Frontend interface to communicate with the computer host such as HBA.
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Areca 1280ml RAID6 volume set failed

Today we hit some kind of worst case scenario and are open to any kind of good ideas. Here is our problem: We are using several dedicated storage servers to host our virtual machines. Before I continue, here are the specs: Dedicated Server…
Richard
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Do SAS expanders work transparently with SAS controllers?

I'm new to SAS expanders and I'm trying to get things right. I understand that SAS expanders, when used with SAS controllers which supports expanders, allows you to utilise the full capacity of supported drives on a controller. However, say I've got…
sbrattla
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How do you connect more than 4 drives to a LSI 9361-4i MegaRAID controller?

I’m fairly new to proper hardware RAID having only used it in pre-built server machines before, but on the recommendation of some friends who work for datacentres I’ve bought an LSI 9361-4i MegaRAID controller to install into my main storage box at…
Benjamin Nolan
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HP P840 HDD RAID 5 many strange drive failures

I've been using a RAID5 HDD storage (8x6TB) at my HP P840 for like 2 years now and it has always had unusually many drive failures. Everything was good for half a year, but now drives are failing in a strange way. For example 2 new drives failed a…
Laord
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raid controller data transfer rate

I'm going to buy an 8-port raid controller for which the declared data trasfer rate is "Up to 6Gb/s per port". The declared connectors are "Two mini-SAS SFF8088". The maximum number of supported physical devices is "Up to 32". The controller is Dell…
Alfatau
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Why has VMWare ESXi 5 slow access to IBM M1015 / LSI 9240-8i RAID?

I am building server for virtualization and wanted to go with VMWare ESXi 5. I configured RAID10 on 4 disks connected to internal RAID controller IBM M1015 (identical to LSI 9240-8i) and installed ESXi without any problems. Only problem is that…
tssk
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Install CentOS 7 on HP dl120 gen9 server with b140i raid controller

I'm trying to install CentOS 7 on a HP DL120 gen 9 server with a b140i controller. I have 4 1TB HDD setup in a raid 1+0 and the CentOS installer doesn't seem to recognize the logical drive created from the storage utility. From my understanding i…
Bogdan-Stefan Cernat
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Identify which drives belong to a specific HP RAID 5 Group

A total of 32 drives were removed from x4 decommissioned HP DL380 G6 servers (eight per server). The setup of the eight drives per host was into two RAID Groups: RAID 1 = SLOT 1, 2 = ESXi OS RAID 5 = SLOT 3, 4, 5, 6, 7, 8 = VMFS Vol (hosting virtual…
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How to find if there is an expander in my controller

I have 2U PowerEdge R510 with PERC H700 Integrated and 8 installed disks, can someone tell me how to find if my disks are using the expander in the backplane or there are all directly attached to the controller. I am experiencing strange…
neoX
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Flash Backed Write Cache (FBWC) without capacitor pack

I brought a HP Smart Array P410 controller and it is installed and working fine in a HP Prolient Microserver with 4 drives in two RAID 1 arrays. I didn’t realise however that it came without any cache so would only work by directly writing straight…
Martyn
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How to find out more hardware details using only ESXi4.1 and (possibly) shell

Running ESXi4.1 on an HP machine, with only remote access to the host ssh shell and the vmware console (no iLO), is there a way to gather a hardware report from the server? I am specifically interested in finding out whether the disks are SAS or…
dyasny
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All disks show as Unconfigured Bad (UBAD) on RAID controller

Before starting, I will say I would appreciate help but really I need to hear from someone that has experienced this issue and how they solved it because the obvious and go to solutions are not working (believe me I have tried for a week). With that…
ATtheincredibleaf
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Proliant DL180G6, RAID controller: centos installation shows phisycal disks, not logical drive

I am installing centos 7 on Proliant DL180g6, with the logical drive. I have 3 disks, with one RAID 1 arrays. I see the logical drive on the controller but I can't see that on installation centos. my controller is b110i. How can I solve this and…
sajjad safaei
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Smart Array P822 with HBA Mode?

We get an HP DL360 G8 with an Smart Array P822 controller. On that controller will come a HP StorageWorks D2700. Does anybody know, that it is possible to run the Smart Array P822 in HBA mode? I found only information about the P410i, who can run…
jb_alvarado
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HP ProLiant DL380 G5 - Use without Raid Controller?

I have just acquired a ProLiant DL380 G5 server and I need to use the pcie slots so I want to remove the raid controller. Problem is I can't find any connector on the motherboard that I can connect the drive to. I only need 1 drive and in fact I…
seanbw
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