1
vote
2answers
40 views

Identifying failed hard drive in RAID

I have a server which is running customized version of Debian. It is attached a sun storage raid. It has very limited tools and installing new tools is not allowed. :( This message I see in dmesg: ...
1
vote
1answer
61 views

How to monitor the hard disk status behind Dell PERC H710 Raid Controller with CentOS 6?

I have a Dell server running CentOS 6 using PERC H710 Raid Controller card with Raid 5 setup and I want to monitor the hard disk failure/working status behind the Raid Controller. Then I should be ...
3
votes
1answer
57 views

How often should I scrub my RAID?

In general I would like to know how often a RAID array needs to be scrubbed. What contributes to the need to scrub more often (reading data?, writing data?, unexpected shutdowns?, drive age?, drive ...
0
votes
1answer
32 views

Dell raid configuation issue omsa

I've been trying to create a raid using the dell srvadmin tools including raidcfg and omconfig. Controller info: [root@ksssd tmp]# /opt/dell/toolkit/bin/raidcfg controller controllerid=0 ...
1
vote
1answer
131 views

Btrfs vs ext4 — Where's the safety break-even point?

Btrfs is still in heavy development and still considered "unstable" by Chris Mason, and many important features are still being added, but the dire warnings of data loss are calamity are long since ...
13
votes
8answers
1k views

Do snapshots + RAID count as a good on-site backup solution?

The two main reasons I can think of for taking backups seems to be taken care of when I use both snapshots and RAID together with btrfs. (By RAID here, I mean RAID1 or 10) Accidental deletion of ...
0
votes
1answer
87 views

How to replace NVRAM battery in BlueArc storage?

The RAID/NVRAM battery on a BlueArc Mercury storage host is located in the front of the storage head, and can be replaced without down time. From what I can gather, after battery change, I have to ...
0
votes
1answer
66 views

LSI Megaraid 150-6 as regular SATA controller

I have an old but reliable server board that does not have any SATA ports on it. Also i have LSI Megararaid 150-6 (with latest firmware) which i want to use as ordinary "dumb" SATA controller. I ...
3
votes
2answers
130 views

Can a 7200RPM drive transfer speed at a full 6 Gbit/s?

Many vendors sell 4GB SATA and Nearline SAS drives which spin at 7200RPM. The vendors will advertise a 6 Gbit/s interface with no mention of actual data transfer speed. I've had conversations with ...
7
votes
1answer
160 views

Which block sizes for millions of small files

I have 2x 4TB Disks in hardware RAID1 (it might be a LSI MegaRaid) on Debian Wheezy. The physical block size is 4kB. I'm going to store 150-200 million of small files (between 3 and 10kB). I'm not ...
1
vote
2answers
110 views

Indepedent pairs of RAID 1 is superior to RAID 10

I am rather new to databases. I was reading up on RAID Storage and it seems that the consensus is that RAID 10 is RAID 10 is best is terms of performance and redundancy However at the end ...
1
vote
2answers
107 views

OMSA Add new disk and convert current single disk to RAID1

We got our new server last week, and unfortunately one of the two disks could not be delivered. Now we've got the second disk, and I want to install it and join it with the current disk to create a ...
1
vote
1answer
53 views

Secure Method for RAID Device Permissions for Network Storage

I manage a smallish network that supports a dozen or so employees. We have about 8 TB of data that lives on several NAS devices. I built a 20 TB RAID file server (with a XFS single partition) recently ...
0
votes
1answer
44 views

Improving Hard Drive controllers and Software RAID [closed]

I believe the biggest pro of hardware RAID is that, providing your RAID controller is battery backed, you can enable write-back cache. This can also be achieved similarly through software RAID with ...
-3
votes
2answers
125 views

RAID 10, 3 drives or 2 drives?

Drives are very cheap these days. Would it be worth it to increase the group size from 2 to 3. I found 1TB drives for $60. I feel as if the array is very vulnerable to failure in a 2 group setup ...
3
votes
1answer
820 views

How should I calculate IOps for RAID50 & RAID60?

I'm investigating some 4TB database systems and I'm comparing differences between RAID-10 & RAID-50. I know how to calculate the IOPS for common RAID levels like RAID-1, RAID-5 & RAID-10. ...
0
votes
2answers
185 views

Safe recovery of a working RAID Array after OS drive failed

I'm working with a server that recently had two drives fail. Windows Server 2003 - Standard Array 0 (bootable) - two 35GB U320 drives in a striped set. Array 1 - two 35GB U320 drives in a striped ...
22
votes
4answers
1k 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 ...
1
vote
2answers
329 views

Intel RAID Web Console 2 and ESXi 5

I have two ESXi servers with Intel SRCSASBB8I RAID controller. When those server have installed ESXi 4.1 I was able to manage RAID configuration of those server using Intel RAID Web Console 2 running ...
2
votes
2answers
118 views

Why it is dangerous to turn off storage arrays even in extreme cases?

I have read in a couple of places that when you are in the situation in which there are no spare disks and the RAID level doesn't protect you from another disk failure, some administrators choose to ...
0
votes
2answers
86 views

Is there redundancy during a RAID build?

We're building an array of 12x 2TB drives in a RAID60 array using an Adaptec hardware card. It's taking a long time to build/verify, and performance is slow. We've worked out that it will be around ...
0
votes
3answers
2k views

Software RAID underneath ESXi datastore

I'm building an virtual environment for a small business. It is based around a single ESXi 5.1 host, which will host half a dozen or so VMs. I'm having some doubts regarding how to implement the ...
-1
votes
2answers
313 views

ESXi local storage recommendation

We are going to buy HP Proliant Server Dl 380p G8, and we want to run vmware esxi 5.1. but I have problem with choosing the correct storage with the lack of budget. we have choice to buy 4x2TB SATA or ...
-5
votes
2answers
326 views

P812 “forgot” RAID6 - can't see disks at boot time in ORCA

We have an MSA60 with 12x4TB non-HP issue Seagate Constellation ES.3 drives connected to a P812/FBWC, on which I created a RAID6 over all of those disks with hpacucli and started to copy data on them. ...
6
votes
1answer
3k views

How exactly does a SAS SFF-8087 breakout cable work? + RAID/connection questions

Please let me know if my question does not makes any sense as I am not sure if I am interpreting it correctly from my thoughts due to my lack of technical knowledge on this. If I am using a ...
0
votes
1answer
64 views

Solaris not seeing FC volume

We recently replaced a failed controller in an AL connected RAID. I wasn't the one that replaced the controller, but apparently when the new controller was installed something weird happened with the ...
0
votes
4answers
194 views

High speed storage drive (over 8 GByte/s) [closed]

Looking for a windows based solution to create a high performance, 8 GB/s storage array. Either by striping together dozens of SSDs, or by create multiple RAID arrays and somehow pooling them ...
2
votes
1answer
64 views

Update RAID 10 NAS storage

I've got a NAS with 4x500GB HDD in RAID 10. I want to change the actual HDDs to others of 1TB capacity, but I want (if possible) to preserve the data without having to copy it outside the NAS. The NAS ...
-2
votes
2answers
77 views

Solution to manage data server with multiple drives

I'm looking for some pointers on the best way to manage a Linux data server, with 20 hard drives and with new files always being added (around 30GB/day). Performance is not important, reliability is ...
1
vote
1answer
82 views

RAID: is it enough to have n+1 disks in a RAID6 array to match performance of a n disks RAID5 array? [closed]

As far as I know, RAID-6 has an even worse penalty on writes than its cousin RAID-5. But we also know that we can get more performance out of a typical RAID array by having more spindles in it. But ...
0
votes
2answers
434 views

No drives showing on LSI 2008 SAS + HP SAS Expander

Followin this guide http://www.servethehome.com/supermicro-x8si6-f-motherboard-review-including-onboard-lsi-sas-2008-controller/ I got myself an RPC 4224 case (They are called Inter-Tech in Europe, ...
0
votes
0answers
242 views

ESXi 5.1 local datastore no longer accessable

I'm running ESXi and just recently rebuilt a raid array, and now an existing local datastore is no longer accessable in ESXi. The details: Original Configuration: 1x usb drive (on the backplane) ...
2
votes
3answers
138 views

Will a raid cache be better for performance than hard drive cache speeds?

In a device that has raid 5, and a "raid cache" of 4GB, does this help performance? I have 32MB cache hard drives but I was wanting to know if the 4GB cache will make up for the difference in ...
8
votes
2answers
828 views

Can different drive speeds and sizes be used in a hardware RAID configuration w/o affecting performance?

Specifically, I have a RAID 1 array configuration with two 500gb 7200rpm SATA drives mirrored as logical drive 1 (a) and two of the same mirrored as logical drive 2 (b). I'd like to add two 1tb ...
-4
votes
1answer
78 views

are there RAID configuration defaults for storage devices? [closed]

Are there certain default configurations within storage devices (such as IBM System Storage DS5020 Express) for RAID 5 and RAID 10? [tried to find if there were by reading whitepaper for DS5020, but ...
0
votes
1answer
217 views

2 RAC node clusters with different RAID layouts?

I am comparing RAID 10 and RAID 5 configurations for Oracle database in order to determine the best choice in terms of performance for mixed workloads. Is it possible to have 2 RAC node clusters and ...
0
votes
2answers
480 views

Linking FreeNAS Boxes

I have two different FreeNAS boxes that are being used for storage. It is possible to link them in a manner that the linked connection can be presented as a single storage destination for clients? ...
4
votes
3answers
874 views

Sparing level on HP EVA 4000

One of the disks of our EVA4000 died today. This diskgroup (all volumes vraid5 with sparing level 1 and almost no space left for more volumes, 1TiB drives) is being rebuilt with "spare space" right ...
2
votes
1answer
226 views

How to get started troubleshooting Linux mdadm raid10 write performance?

Using Linux mdadm, I've setup a six disk raid10,f2 array. I'm using 7200RPM SATA drives. The biggest load I am worried about is recording four streams of live video (worst case of 20Mbits each, final ...
0
votes
3answers
682 views

RAID 10 or RAID 50 on 16x 900 GB 10K SFF disks

What type of RAID would you recommend for a single storage segment across 16 of 900 GB 10K SAS SFF disks on an EMC VNX 5100 storage unit? Disk 17 is a hot-spare. RAID 10, RAID 50 or something else? ...
0
votes
1answer
285 views

mdadm: superblock on /dev/sdd1 doesn't match others - assembly aborted

OS: Debian Squeeze Kernel: 2.6.32-5-amd64 mdadm version: 3.1.4 (31 August 2010) mdarrays md1 = raid1 (this is working) (devices: /dev/sd[fg]1) md0 = raid6 (previously raid5, ...
4
votes
1answer
1k views

Does a RAID 1 really protect from HDD failure?

If using a RAID 1 and if there are any inconsistencies between both disks found, data is copied from the primary disk (most likely the one with the lower port number) to the secondary disk. 1) But ...
1
vote
1answer
141 views

ML350 Using both p800 and e200i

I have an ML350 G5 with a P800 and the integrated e200i. I'm using the P800 to service the main drive cage with 6 SAS drives in RAID 5. However, I would love to also convert some of the unused 5.25" ...
1
vote
1answer
111 views

Can I use an HP Smary Array SAS Controller Card In Non-HP Server? [duplicate]

Possible Duplicate: Proliant raid controller in a PC There are a bunch of cheap HP Smart Array SAS controller cards on ebay and I'm wondering if they will work with non HP servers ...
-2
votes
4answers
395 views

How can I create one big volume from multiple drives, but loose only the files stored on one disk if it fails?

I am running a storage system. Fault tolerancy is handled at application level (files are stored on multiple servers, even datacenters). Therefore I don't need nor even want redundancy within one ...
5
votes
2answers
2k views

Does adding more drives to a RAID 10 Array increase performance?

I'd like to know if I were to add additional drives to an existing Raid 10 if this would increase the speed of the entire array?
-3
votes
1answer
56 views

The two devices which facilitate storage over a network [closed]

I have been ask for specifically 'THE TWO' devices which facilitate storage over a network, powerful in addressing, failures and redundancy. Could anyone figure out which devices these are? It seems ...
0
votes
2answers
267 views

hp sb40c and hp bl460c storage

I have an HP ProLiant BL460c partnered with an HP SB40c blade server. The storage controller for the BL460c is HP Smart Array E200 while the SB40c's controller is P400. In my configuration, the ...
1
vote
1answer
2k views

HP ProLiant DL380 G4 RAID conversion?

Proliant DL380-G4 with the onboard SmartArray 6i controller. Raid 1+0 set consisting of 2x 72 G and 2x 300 G disks (the bigger disks got added later). Effective capacity about 140 GB and, of course, ...
3
votes
1answer
1k views

What are Linux SCSI command timeouts and is the default suited for software raid?

My understanding of SCSI timeouts is that any read, write, flush and other commands have a limited time to complete. If exceeded, the command is aborted and an error is reported to the upper layer. ...