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Questions tagged [lsi]

LSI is a manufacturer of enterprise storage and networking components.

LSI is a manufacturer of enterprise storage and networking components.

243 questions
86
votes
6 answers

Software vs hardware RAID performance and cache usage

I've been reading a lot on RAID controllers/setups and one thing that comes up a lot is how hardware controllers without cache offer the same performance as software RAID. Is this really the case? I always thought that hardware RAID cards would…
ItsJustMe
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4 answers

How effective is LSI CacheCade SSD storage tiering?

LSI offers their CacheCade storage tiering technology, which allows SSD devices to be used as read and write caches to augment traditional RAID arrays. Other vendors have adopted similar technologies; HP SmartArray controllers have their SmartCache.…
ewwhite
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13
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1 answer

Managing battery relearn cycles on LSI and similar RAID controllers

How do engineers deal with RAID controller battery "relearn" cycles? As noted in: What's a "battery relearn" on a LSI MegaRaid?, relearn cycle discharges the RAID controller battery (BBWC or BBU), thus removing the write cache acceleration. The…
ewwhite
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1 answer

How do I extend a RAID5 array with storcli?

I just bought a new disk. How do I extend an existing RAID array without losing data?
Aaron Digulla
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7
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0 answers

RAID60 w. LSI 9361-8i: Consistency Check repetitively finds inconsistent parity

I'm maintaining a pre-configured storage system for a project team. The storage consists of 36 x 8 TB HGST Disks (~240 TB net) in RAID60 (2x18 disks in RAID6), Controller is a MegaRAID SAS 9361-8i, OS=Scientific Linux 7.2 storcli64 /c0 /v1…
alphabricks
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7
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5 answers

LSI Megaraid alarm - clearing hotspare

I have several Supermicro servers with LSI Megaraid controllers, 9266-8i. One recently lost a drive; I replaced it as usual, but it is still beeping on reboot. It is set up as RAID 10 + hotspare. MegaCli64 -AdpEventLog -GetEvents -f events.log…
Bob
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7
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2 answers

LSI 9285-8e and Supermicro SC837E26-RJBOD1 duplicate enclosure ID and slot numbers

I am working with 2 x Supermicro SC837E26-RJBOD1 chassis connected to a single LSI 9285-8e card in a Supermicro 1U host. There are 28 drives in each chassis for a total of 56 drives in 28 RAID1 mirrors. The problem I am running in to is that there…
Andy Shinn
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6
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2 answers

Do I need to initialize a MegaRAID virtual disk after adding it?

I have an AVAGO 3108 MegaRAID controller. I added a virtual disk with the storcli64 command below. Do I also need to run storcli /c0/v0 start initialization? storcli64 /c0 add vd type=r6 drives=0:0-10
royco
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6
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1 answer

Does enabling JBOD mode on LSI based controllers affect existing logical disks/arrays?

I've got an LSI2208 integrated raid controller on a Supermicro X9DRH server board. It currently has a Logical Drive (LD) composed of 4 spinning disks. Now I want to add some more drives in JBOD, to let the OS access them directly (as opposed to…
Phil Regnauld
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6
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4 answers

Is there a linux monitoring utility for Dell PERC H700?

I'm looking for a utility to monitor my RAID 5 setup, the card is a Dell PERC H700 with the following chipset: [root@example.net ~]# lspci -v|grep LSI 03:00.0 RAID bus controller: LSI Logic / Symbios Logic MegaRAID SAS 2108 [Liberator] (rev 05) The…
angelcool.net
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6
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1 answer

How is LSI FastPath different from Software RAID?

This question pertains to SSDs on RAID levels without parity (like RAID 0, 1, 10). The recommended settings for FastPath are to set the Write Policy to Write Through, Read Policy to No Read Ahead and IO Policy to Direct. This disables the cache on…
A.Jesin
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6
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2 answers

Just installed LSI 9211; no drives showing up to Linux

I just added a LSI 9211-8i to a system running Debian Wheezy (on the Linux kernel). All software is up to date and the kernel is 3.2.65-1+deb7u2 x86_64 according to uname. The card came straight out of the packaging and into the host after visual…
user
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6
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5 answers

RAID level confusion (MegaCli vs megasasctl output)

I'm utterly new to working with LSI MegaRAID controllers and I'm confused as to what RAID level I am actually running. My server is equipped with 4 disks, 4TB each and I would like to have them running in RAID-10. Searching around for some hints…
Erathiel
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6
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5 answers

LSI RAID: Write cache policy affects read performance?

I have a server with a LSI MegaRAID SAS 9260-4i controller, RAID-5 with 3 x 2 TB disks. I did some performance testing (with iozone3) and the numbers show clearly that the write cache policy affects the read performance as well. If I set the policy…
tlo
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6
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8 answers

LSI MegaRAID Expected Chip Temperature?

We recently built a replicating SAN array from 2x Dell R720XD's, we are using LSI 9270-8i MegaRAID cards with CacheCade 2.0, BBU and Write Back cache enabled. Our cards are showing HUGE chip temperatures (97*C+ with NO disk activity!). Our R720's…
Myles Gray
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