Re: [CentOS] CentOS 7 and Areca ARC-1883I SAS controller: JBOD or not to JBOD?

2017-01-21 Thread John R Pierce
On 1/21/2017 9:02 AM, Valeri Galtsev wrote: (yes, RAID60 is there too, but too wasteful for simple things we do). no raid group should be over 10-12 drives, so if you have a really large array, say 30 drives, its best to stripe three raid6's of 10 drives each, or whatever. -- john r

Re: [CentOS] CentOS 7 and Areca ARC-1883I SAS controller: JBOD or not to JBOD?

2017-01-21 Thread Valeri Galtsev
On Sat, January 21, 2017 12:16 am, Keith Keller wrote: > On 2017-01-20, Valeri Galtsev wrote: >> >> Hm, not certain what process you describe. Most of my controllers are >> 3ware and LSI, I just pull failed drive (and I know phailed physical >> drive >> number), put

Re: [CentOS] CentOS 7 and Areca ARC-1883I SAS controller: JBOD or not to JBOD?

2017-01-20 Thread Keith Keller
On 2017-01-20, Valeri Galtsev wrote: > > Hm, not certain what process you describe. Most of my controllers are > 3ware and LSI, I just pull failed drive (and I know phailed physical drive > number), put good in its place and rebuild stars right away. I know for sure

Re: [CentOS] CentOS 7 and Areca ARC-1883I SAS controller: JBOD or not to JBOD?

2017-01-20 Thread Cameron Smith
I was just trying to be helpful. *backs away slowly* Cameron On Fri, Jan 20, 2017 at 5:16 PM, Valeri Galtsev wrote: > > On Fri, January 20, 2017 7:00 pm, Cameron Smith wrote: > > Hi Valeri, > > > > > > Before you pull a drive you should check to make sure that doing

Re: [CentOS] CentOS 7 and Areca ARC-1883I SAS controller: JBOD or not to JBOD?

2017-01-20 Thread Valeri Galtsev
On Fri, January 20, 2017 7:00 pm, Cameron Smith wrote: > Hi Valeri, > > > Before you pull a drive you should check to make sure that doing so > won't kill the whole array. Wow! What did I say to make you treat me as an ultimate idiot!? ;-) All my comments, at least in my own reading, we about

Re: [CentOS] CentOS 7 and Areca ARC-1883I SAS controller: JBOD or not to JBOD?

2017-01-20 Thread Cameron Smith
Hi Valeri, Before you pull a drive you should check to make sure that doing so won't kill the whole array. MegaCli can help you prevent a storage disaster and can let you have more insight into your RAID and the status of the virtual disks and the disks than make up each array. MegaCli will

Re: [CentOS] CentOS 7 and Areca ARC-1883I SAS controller: JBOD or not to JBOD?

2017-01-20 Thread Gordon Messmer
On 01/20/2017 09:31 AM, Peter Peltonen wrote: I am planning to have RAID1 setup and I am wondering if I should use the controller's RAID functionality which has 2GB cache or should I go with JBOD + Linux software RAID? I'd recommend testing the specific application that will run on this

Re: [CentOS] CentOS 7 and Areca ARC-1883I SAS controller: JBOD or not to JBOD?

2017-01-20 Thread John R Pierce
On 1/20/2017 10:59 AM, Joseph L. Casale wrote: Not related to your question, but something to keep in mind: What type of enclosure are you using? If you are using an engineered system your enclosure will communicate with the controller. When a disk fails it's a pain in the arse to figure out

Re: [CentOS] CentOS 7 and Areca ARC-1883I SAS controller: JBOD or not to JBOD?

2017-01-20 Thread Valeri Galtsev
On Fri, January 20, 2017 5:16 pm, Joseph L. Casale wrote: >> This is why before configuring and installing everything you may want to >> attach drives one at a time, and upon boot take a note which physical >> drive number the controller has for that drive, and definitely label it >> so >> y9ou

Re: [CentOS] CentOS 7 and Areca ARC-1883I SAS controller: JBOD or not to JBOD?

2017-01-20 Thread John R Pierce
On 1/20/2017 9:31 AM, Peter Peltonen wrote: I am planning to have RAID1 setup and I am wondering if I should use the controller's RAID functionality which has 2GB cache or should I go with JBOD + Linux software RAID? The disks I am going to use are 6TB Seagate Enterprise ST6000NM0034 7200rpm

Re: [CentOS] CentOS 7 and Areca ARC-1883I SAS controller: JBOD or not to JBOD?

2017-01-20 Thread Joseph L. Casale
> This is why before configuring and installing everything you may want to > attach drives one at a time, and upon boot take a note which physical > drive number the controller has for that drive, and definitely label it so > y9ou will know which drive to pull when drive failure is reported.

Re: [CentOS] CentOS 7 and Areca ARC-1883I SAS controller: JBOD or not to JBOD?

2017-01-20 Thread Valeri Galtsev
On Fri, January 20, 2017 12:59 pm, Joseph L. Casale wrote: >> The disks I am going to use are 6TB Seagate Enterprise ST6000NM0034 >> 7200rpm SAS/12Gbit 128 MB > > Sorry to hear that, my experience is the Seagate brand has the shortest > MTBF > of any disk I have ever used... > >> If hardware RAID

Re: [CentOS] CentOS 7 and Areca ARC-1883I SAS controller: JBOD or not to JBOD?

2017-01-20 Thread Joseph L. Casale
> The disks I am going to use are 6TB Seagate Enterprise ST6000NM0034 > 7200rpm SAS/12Gbit 128 MB Sorry to hear that, my experience is the Seagate brand has the shortest MTBF of any disk I have ever used... > If hardware RAID is preferred, the controller's cache could be updated > to 4GB and I

Re: [CentOS] CentOS 7 and Areca ARC-1883I SAS controller: JBOD or not to JBOD?

2017-01-20 Thread Nux!
- Original Message - > From: "Peter Peltonen" <peter.pelto...@gmail.com> > To: "CentOS mailing list" <centos@centos.org> > Sent: Friday, 20 January, 2017 17:31:56 > Subject: [CentOS] CentOS 7 and Areca ARC-1883I SAS controller: JBOD or not > to JBOD? &g

[CentOS] CentOS 7 and Areca ARC-1883I SAS controller: JBOD or not to JBOD?

2017-01-20 Thread Peter Peltonen
Hi, Does anyone have experiences about ARC-1883I SAS controller with CentOS7? I am planning to have RAID1 setup and I am wondering if I should use the controller's RAID functionality which has 2GB cache or should I go with JBOD + Linux software RAID? The disks I am going to use are 6TB Seagate