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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 ...
RiGiD5's user avatar
  • 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 ...
Mike S's user avatar
  • 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 ...
shodanshok's user avatar
  • 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. ...
shodanshok's user avatar
  • 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 ...
Simon Richter's user avatar
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 ...
Nikita Kipriyanov's user avatar
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-...
Han Solo's user avatar
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 ...
ewwhite's user avatar
  • 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 ...
shodanshok's user avatar
  • 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 ...
ewwhite's user avatar
  • 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 ...
Steve Bonds's user avatar
  • 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 ...
s1lv3r's user avatar
  • 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 ...
Mark Henderson's user avatar
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.
poige's user avatar
  • 9,568
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 ...
shodanshok's user avatar
  • 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 ...
Knox's user avatar
  • 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 ...
JimNim's user avatar
  • 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 ...
s1lv3r's user avatar
  • 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.
Chopper3's user avatar
  • 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 ...
Net Runner's user avatar
  • 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: ...
Alexander Worlitschek's user avatar
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 ...
batistuta09's user avatar
  • 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, ...
Nikita Kipriyanov's user avatar
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 (...
s1lv3r's user avatar
  • 1,155
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 ...
Spooler's user avatar
  • 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... ...
JimNim's user avatar
  • 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. ...
JimNim's user avatar
  • 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 ...
shodanshok's user avatar
  • 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 ...
user9517's user avatar
  • 116k
3 votes

PERC, Caching with SSDs

Is there any benefit to having caching enabled? Yes, there is still a potential for performance benefit with the on-controller caching. SSDs do perform significantly faster than spindle drives, but ...
JimNim's user avatar
  • 2,796

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