13
votes
RAID10 with 2 failed drives
Make sure you have an up-to-date backup. If, for whatever reason, you don’t - start evacuating your data immediately! Don’t do it in parallel with the RAID rebuild as it puts more pressure on disks ...
- 1,300
11
votes
How to monitor the hard disk status behind Dell PERC H710 Raid Controller with CentOS 6?
The accepted answer recommends the audacity that is yum install srvadmin-all. Blecch. Here's how to make it slightly less blecch-y (but still blecch-y nonetheless; you can get much leaner on HP's ...
- 1,215
11
votes
How to install ZFS on Dell Poweredge server and Dell disk array without using the RAID controller
It depends:
H200/300 and PERC9 (ie: 330, 730, 830) cards have the capability to work in pass-through mode, meaning that the disks can be directly presented to the operating system. To do that, you ...
- 50.7k
10
votes
Accepted
FIO Benchmarking - Inconsistent and Slower than Anticipated: Are my RAIDs Misconfigured?
When benchmarking ZFS pools, you need to understand how caching and recordsize interact with your workloads:
your fio commands do not skip the linux pagecache (no --direct=1 option), nor ZFS ARC. ...
- 50.7k
10
votes
Differences between HW RAID and ZFS
Hardware RAID vs ZFS doesn't make a lot of difference from a raw throughput perspective -- either system needs to distribute data across multiple disks, and that requires running a few bit shifting ...
- 3,357
9
votes
Is it possible to recover data from an Intel PERC H710 Adapter RAID Controller disks into another server with SAS controller
LSI/Avago/Broadcom MegaRAID SAS devices happily recognize RAIDs from each other. PERC H710 is such a rebranded controller with LSI chip. Once in my experience we transferred a pair of devices from ...
- 12.6k
8
votes
How to monitor the hard disk status behind Dell PERC H710 Raid Controller with CentOS 6?
I was struggling also to get it work in CentOS and I found a working package here http://mirror.ndchost.com/software/lsi/
called "MegaCli-8.07.10-1.noarch.rpm"
The command reference http://hwraid.le-...
- 81
7
votes
Dell R730xd - Best way to configure storage for simultaneous use with ZFS & Hardware RAID
Regarding your question about splitting the backplane across controllers, yes, it's possible. I've done this with 8-bay enclosures where two 4-lane SAS SFF-8087 connectors were present. 4 disks to one ...
- 198k
6
votes
Dell R620 with PERC s110 and LSI Centos 8 not discovering RAID drives
DELL S110 is nothing more than a fancy name for Intel software RAID (see the SATA controller specification). It depends on a device driver being present in Windows which effectively run the software ...
- 50.7k
5
votes
Accepted
Mix HDD and SSD in same RAID 1 array
You cannot mix drive types in the same array group on PERC/LSI/HP hardware RAID controllers.
This also applies to mixing SATA, SAS and SSD.
PERC manual:
"Mixing SAS and SATA drives within a ...
- 198k
5
votes
How to monitor the hard disk status behind Dell PERC H710 Raid Controller with CentOS 6?
The perccli command can also show you a lot of drive info if you ask it nicely:
# /opt/MegaRAID/perccli/perccli64 /c0/e32/s0 show all
Controller = 0
Status = Success
Description = Show Drive ...
- 1,054
5
votes
Accepted
Raid 10 recovery on Dell Server - Perc 6/i
Is there any way to recover?
If you happen to know the exact parameters used to originally create the Virtual Disk (especially the order of the disks and the strip-size) and if we assume that there ...
- 1,155
5
votes
Are Dell PERC H200 H700 RAID cards supported by ".deb" based Linux distros?
Most PCI-based "real" SATA/SAS RAID controllers (not "fakeraid") don't need special drivers. This is not excusively the case (I'm sure a lot of us have had to scramble for HBA drivers for new Windows ...
- 69.1k
5
votes
Accepted
Linux: ZFS analog of pvmove - how to move data off from vdev?
how to move data off from vdev?
Can't be done except for mirrored pools.
- 9,558
5
votes
Dell R730xd - Best way to configure storage for simultaneous use with ZFS & Hardware RAID
Replying to each questions:
while you can install another PCI-E RAID card, the backplane can be connected to a single card. So you can't concurrently use the native RAID card and the additional one ...
- 50.7k
4
votes
Accepted
Dell PERC RAID array how to ignore error
Not necessarily the root of my problem, but to get around the immediate problem of not booting, you have to clear the cache in the PERC BIOS. To clear the cache, you navigate to the screen that has ...
- 2,491
4
votes
How to create degraded raid6 array using megacli
You cannot create a new RAID in a degraded state with PERC controllers. You'll need to use drives that are "unconfigured good" and presently in the system.
I would recommend simply creating a RAID6 ...
- 2,796
4
votes
Failed Dell PowerEdge T410: Move Hardware RAID PERC H700: 3 x 300GB SAS (1 faulty) to 2nd T410 for Disk Cloning & Boot
You don't write anything about the kind of failure on the non working server. I'll assume that the problem is not a broken RAID due to failed hard drives. Obviously, in that situation, it would be of ...
- 1,155
4
votes
RAID5 FOREIGN DRIVE ISSUE
"Please suggest what step will save my Raid 5 without loosing data"
Restore from last known good backup, oh and don't use RAID5.
- 102k
4
votes
Dell PowerEdge 2950 with PERC 5/i - pxe-e53 boot
PXE-E53 No boot error means your server is trying to boot over the network using the PXE protocol. Most probably you have DHCP server running in your network thus server is getting an IP address and ...
- 6,249
4
votes
Where to get storcli64 for Linux from LSI MegaRAID now that Broadcom has taken over?
Start on the broadcom Homepage: www.broadcom.com
Click on Support -> MegaRAID and HBAs
Then Support Documents and Downloads
Fill out the Form:
- Product Group: Storage Adapters
- Product Family: ...
4
votes
RAID Recommendation Request: 2x RAID5 arrays, 1 Large RAID5, RAID10?
You need to define, what has the highest priority for you:
Performance. RAID10, especially on write operation.
Redundancy. RAID6.
Capacity efficiency. Single RAID5.
In my opinion 2 x RAID5 makes no ...
- 9,126
4
votes
Accepted
Access data from drive images of raid drives
Yes, with Linux MD RAID and its mdadm userspace interface tool you should be able to assemble the RAID even from PERC which is rebranded LSI/Avago/Broadcom MegaRAID. It uses SNIA DDF on-disk format, ...
- 12.6k
3
votes
Accepted
Will a H310 Mini or a H200 support Samsung SSDs (840/850 Pros)?
To give an anecdotal response; the 840 Pro did work on the H310 when I tried them.
The problem is, especially the firmware of the H310 has a ridiculous low queue depth preset and because of this may (...
- 1,155
3
votes
Accepted
Replacing RAID Control Battery DELL PowerEdge 2950
The configuration is saved to both controller and each disk. You should be safe doing a power down, change battery and power up.
- 371
3
votes
best raid level for backup server
If you're going to use a hardware card, RAID 50 or 60 seems fine for this case. 10 is overkill. For storing a backup of living data (rather than something like tapes), I generally prefer the use of ...
- 7,136
3
votes
Accepted
Does R710 with PERC H700 auto rebuild single drive in raid 5?
I bought a new drive, powered down the machine, and replaced the failing drive
You shouldn't need to power down the system for a simple drive replacement, since those components are hot-swappable... ...
- 2,796
3
votes
Accepted
Using older SAS drives on percH310 RAID as hot spare
Regarding detrimental effects in a RAID5 specific to the drive being older:
Test the drive as a non-spare drive first (perhaps as a single-drive RAID0) and verify that it doesn't fail under workload. ...
- 2,796
3
votes
Are Dell PERC H200 H700 RAID cards supported by ".deb" based Linux distros?
PERC H200, H300, H700 and so on do not require specific 3rd party drivers to function; they merely export a SCSI disk device to the OS (which can use the builtin SCSI drivers).
That said, additional ...
- 50.7k
3
votes
Accepted
Trouble Installing Ubuntu Server on PowerEdge R330 (Hardware RAID1)
The S130 is a software RAID solution that needs OS drivers to support it. I believe that it is only supported by Windows OS and according to this RHEL7.2/SLES11/SLES12. This is why your Ubuntu is ...
- 116k
Only top scored, non community-wiki answers of a minimum length are eligible