This concerns a server that runs ESXi (v. 4.x or 5.x) installed on drives that are configured into a raid10 using an LSI 3ware 97050 raid controller. I would like to know if there is a way to monitor the LSI 3ware series of controllers, in particular the 9750, through ESXi. And to hopefully also run the monitoring daemon LSI provides. I know you can set up a cronjob to execute tw_cli through ssh on [...]

I have a 45-disk array of Seagate Barracuda 3 TB ST3000DM001 (yes these are desktop drives I’m aware of that) in a Supermicro sc847 JBOD, connected via LSI 9285. I have found a solution for the problem description below by reducing speed via MegaCli -PhySetLinkSpeed -phy0 2 -a0; for i in $(seq 48); do MegaCli -PhySetLinkSpeed -phy${i} 2 -a0; done and rebooting. The question remains: Is this typical for current 6 gb/s equipment? Is this [...]

On some systems I see this : Personalities : [linear] [raid0] [raid1] [raid10] [raid6] [raid5] [raid4] [multipath] [faulty] md1 : active raid1 sdb1[1] sda1[0] 10485696 blocks [2/2] [UU]md2 : active raid1 sdb2[1] sda2[0] 477371328 blocks [2/2] [UU] And other systems show : Personalities : [raid1] md0 : active raid1 sdb2[1] sda2[0] 204788 blocks super 1.0 [2/2] [UU]md1 : active raid1 sdb1[1] sda1[0] 4193272 blocks super 1.1 [2/2] [UU]md2 : active raid1 sda3[0] sdb3[1] 483985276 blocks [...]

For some reason I need to power up a system full of data without having any documentation about cabling. I have : 1x Proliant DL 180 G5 with P800 3x full loaded smart array 60 with probably 2 logical drive full of data The Proliant DL 180 can boot without any smart array 60 attached; the OS is on the internal HD. My question, based on the fact that I’m not sure about the cabling [...]

I have an Adaptec 3805 RAID controller and with two arrays without write cache. Now that I have bought the battery module for this controller, can I now enable the write cache on the existing arrays? Or do I need to delete and re-create new arrays with write cache on? Asked by Ciguli You enable/disable the write cache without any other modifications. Just use the same management software you use to create/delete arrays. You even [...]

I’m facing with a pretty easy problem in my opinion. I’ve extracted a working disk from a RAID1 and I’m looking to copy only data (FS and RAID configuration doesn’t matter) into another location (another FS). My problem is I’m not able to mount properly this disk into another linux. I’ve first looked the partition table : # fdisk -l /dev/sdc Disk /dev/sdc: 640.1 GB, 640135028736 bytes 255 heads, 63 sectors/track, 77825 cylinders, total 1250263728 [...]

I am in charge of a new website in a niche industry that stores lots of data (10+ TB per client, growing to 2 or 3 clients soon). We are considering ordering about $5000 worth of 3TB drives (10 in a RAID 6 configuration and 10 for backup), which will give us approximately 24 TB of production storage. The data will be written once and remain unmodified for the lifetime of the website, so we [...]

In my last questions I didn’t make myself clear, so I will do my best to explain it. I have a server with esxi 5 installed on it. I am not able to setup hardware raid atm, and need a workaround. From previous question I have been told to setup a raid for guest-os (don’t confuse with hardware/software raid for/on host). I wasn’t able to find any information about this, nor found any option in [...]

I wanted to test performance in a RAID10 with a “damaged drive”. To simulate this situation I’ve set a single drive to “Offline” by using this command: MegaCli -PDOffline -PhysDrv [45:12] -aAll The drive went offline but directly with this command another drive switched to “failed”. I checked the status of all drives before performing this command. All were marked as online. Does setting a drive “offline” puts alot of pressure on the hardware so [...]

How do I create a Debian system which is bootable, has a software raid10 and will still boot when I take out one or more (bootable) disks? I would like to use as few disks as possible, preferably 3 or 4. And each disk that is part of the raid should be bootable. I am choosing a raid10 because it’s the fastest redundant raid level and still gives me quite a lot of space. A [...]