Install Centos 7 On Proliant Dl380

25.12.2019

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I have CentOS 6.x installed on a 'HP ProLiant DL380 G5' server. Ithas eight 750GB drives in a hardware RAID6 array. Its acting as ahost for a number of OpenVZ containers.Seems like every time I reboot this server which is not very often itsits for hours running a disk check or something on boot. The serveris located 200+ miles away so its not very convenient to look at. Isthere anyway to tell if it plans to run this or tell it not too?Right now its reporting one of the drives in array is bad and lasttime it did this a reboot resolved it. On 8/21/2014 12:43 PM, Matt wrote:I have CentOS 6.x installed on a 'HP ProLiant DL380 G5' server.

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Ithas eight 750GB drives in a hardware RAID6 array. Its acting as ahost for a number of OpenVZ containers.Seems like every time I reboot this server which is not very often itsits for hours running a disk check or something on boot. The serveris located 200+ miles away so its not very convenient to look at. Isthere anyway to tell if it plans to run this or tell it not too?Right now its reporting one of the drives in array is bad and lasttime it did this a reboot resolved it.assuming thats a hp smartarray raid controller, use hpacucli to diagnosethe raid problem.degraded raid6 is /really/ slow. Matt wrote:I have CentOS 6.x installed on a 'HP ProLiant DL380 G5' server.

Isthere anyway to tell if it plans to run this or tell it not too?Right now its reporting one of the drives in array is bad and lasttime it did this a reboot resolved it.You need to know what it's running. If it's doing an fsck, that will takea lot of time.

If it's firmware in the RAID controller, that's different.You can run tune2fs /dev/whatever and see how often it wants to run fsck.For that matter, what's the entry in /etc/fstab?mark. I have CentOS 6.x installed on a 'HP ProLiant DL380 G5' server. Ithas eight 750GB drives in a hardware RAID6 array. Its acting as ahost for a number of OpenVZ containers.Seems like every time I reboot this server which is not very often itsits for hours running a disk check or something on boot.

The serveris located 200+ miles away so its not very convenient to look at. Isthere anyway to tell if it plans to run this or tell it not too?Right now its reporting one of the drives in array is bad and lasttime it did this a reboot resolved it.You need to know what it's running. If it's doing an fsck, that will takea lot of time. If it's firmware in the RAID controller, that's different.You can run tune2fs /dev/whatever and see how often it wants to run fsck.For that matter, what's the entry in /etc/fstab?markCentOS mailing listCentOS at centos.org. Digimer You know that hpacucli (and MegaCli on LSI-based hardware RAID systems) can usually tell you more about the array and the drives than mdadm can, right? Also, if you're doing parity, having hardware RAID moves the parity calculations to a dedicated ASIC, avoiding any load of note on the CPU.

Also, with hardware RAID, you get battery-backed or flash-backed write-back caching, which can dramatically improve performance. That said, mdadm is better that cheap fake-RAID controllers like you find on. You know that hpacucli (and MegaCli on LSI-based hardware RAID systems)can usually tell you more about the array and the drives than mdadm can,right? Also, if you're doing parity, having hardware RAID moves theparity calculations to a dedicated ASIC, avoiding any load of note onthe CPU. Also, with hardware RAID, you get battery-backed orflash-backed write-back caching, which can dramatically improve performance.That said, mdadm is better that cheap fake-RAID controllers like youfind on most mainboards, I will give you that.digimer. I have CentOS 6.x installed on a 'HP ProLiant DL380 G5' server. Ithas eight 750GB drives in a hardware RAID6 array.

Its acting as ahost for a number of OpenVZ containers.Seems like every time I reboot this server which is not very often itsits for hours running a disk check or something on boot. The serveris located 200+ miles away so its not very convenient to look at. Isthere anyway to tell if it plans to run this or tell it not too?Right now its reporting one of the drives in array is bad and lasttime it did this a reboot resolved it.You need to know what it's running. If it's doing an fsck, that will takea lot of time. If it's firmware in the RAID controller, that's different.You can run tune2fs /dev/whatever and see how often it wants to run fsck.For that matter, what's the entry in /etc/fstab?markCentOS mailing listCentOS at centos.orgCentOS mailing listCentOS at centos.org-DigimerPapers and Projects:What if the cure for cancer is trapped in the mind of a person withoutaccess to education?

I have CentOS 6.x installed on a 'HP ProLiant DL380 G5' server. Ithas eight 750GB drives in a hardware RAID6 array.

Matt wrote:Hate to change the conversation here but that's why I hate hardwareRAID.If it was software RAID, Linux would always tell you what's going on.Besides, Linux knows much more about what is going on on the disk andwhat is about to happen (like a megabyte DMA transfer).BTW, check if something is creating:/forcefsckThese exist:-rw-r-r- 1 root root 0 Jul 7 10:03.autofsck-rw-r-r- 1 root root 0 Jul 7 10:03.autorelabelWhat does that mean?ARRRGGGHGHGHGHGHGHHGHGHHHH!!!!!!!First, delete /.autofsck. That will stop it from fsckin'g.everything.every reboot. Second, is selinux in enforcing mode? In any case, have yourecently done major changes? If not, delete /.autorelabel, since anselinux relabel takes a.while., esp. If you have.lots.

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of files.mark. Hate to change the conversation here but that's why I hate hardwareRAID.If it was software RAID, Linux would always tell you what's going on.Besides, Linux knows much more about what is going on on the disk andwhat is about to happen (like a megabyte DMA transfer).BTW, check if something is creating:/forcefsckThese exist:-rw-r-r- 1 root root 0 Jul 7 10:03.autofsck-rw-r-r- 1 root root 0 Jul 7 10:03.autorelabelWhat does that mean?ARRRGGGHGHGHGHGHGHHGHGHHHH!!!!!!!First, delete /.autofsck. That will stop it from fsckin'g.everything.every reboot. Second, is selinux in enforcing mode?

In any case, have yourecently done major changes? If not, delete /.autorelabel, since anselinux relabel takes a.while., esp. If you have.lots. of files.markCentOS mailing listCentOS at centos.org/.autorelabel gets created on all SELinux disabled systems. Since if youre-enable it, you will need a relabel.

Hate to change the conversation here but that's why I hate hardwareRAID.If it was software RAID, Linux would always tell you what's going on.Besides, Linux knows much more about what is going on on the disk andwhat is about to happen (like a megabyte DMA transfer).BTW, check if something is creating:/forcefsckThese exist:-rw-r-r- 1 root root 0 Jul 7 10:03.autofsck-rw-r-r- 1 root root 0 Jul 7 10:03.autorelabelWhat does that mean?ARRRGGGHGHGHGHGHGHHGHGHHHH!!!!!!!First, delete /.autofsck. That will stop it from fsckin'g.everything.every reboot. Second, is selinux in enforcing mode? In any case, have yourecently done major changes? If not, delete /.autorelabel, since anselinux relabel takes a.while., esp. If you have.lots.

of files.markNo, /.autofsck is not harmful and will cause nothing unless/etc/sysconfig/autofsck exists and has something specific defined. The/.autofsck is automatically created at each boot by the system./.autorelabel is as well only a control file and does not cause a fullSELiux relabeling at each boot.If you don't believe me, please see /etc/rc.sysinit.Alexander. Hate to change the conversation here but that's why I hate hardwareRAID.If it was software RAID, Linux would always tell you what's going on.Besides, Linux knows much more about what is going on on the disk andwhat is about to happen (like a megabyte DMA transfer).BTW, check if something is creating:/forcefsckThese exist:-rw-r-r- 1 root root 0 Jul 7 10:03.autofsck-rw-r-r- 1 root root 0 Jul 7 10:03.autorelabelWhat does that mean?ARRRGGGHGHGHGHGHGHHGHGHHHH!!!!!!!First, delete /.autofsck. That will stop it from fsckin'g.everything.every reboot. Second, is selinux in enforcing mode?

In any case, have yourecently done major changes? If not, delete /.autorelabel, since anselinux relabel takes a.while., esp. If you have.lots.

Valeri Galtsev I love hardware RAID. 3ware more than others. In case of hardware RAID it is tiny specialized system (firmware) that is doing RAID function. In the specialized CPU (I should have called it differently) inside hardware RAID controller. Independent on the rest of computer, and needing only power to keep going. Tiny piece of code, very simple function. It is really hard to introduce bugs into these.

Therefore you unlikely will have problem on device level. To find the status of the device and its. On Thu, August 21, 2014 3:54 pm, Matt wrote:Hate to change the conversation here but that's why I hate hardwareRAID.I love hardware RAID. 3ware more than others. In case of hardware RAID itis tiny specialized system (firmware) that is doing RAID function.

In thespecialized CPU (I should have called it differently) inside hardware RAIDcontroller. Independent on the rest of computer, and needing only power tokeep going. Tiny piece of code, very simple function. It is really hard tointroduce bugs into these. Therefore you unlikely will have problem ondevice level.

To find the status of the device and its components(physical drives) you always can use utility that comes from hardwarevendor, you can have even web interface if it is 3ware. If it was software RAID, Linux would always tell you what's going on.It does.

And so does hardware RAID device. And most of them (3ware inparticular) do not do offline (i.e. Delaying boot) check/rebuild, but theydo it online (they are being operational in degraded state, and donecessary rebuild with IO present on the device, they just exportthemselves to Linux kernel with the warning of being degraded RAID duringboot).Software RAID, however, has a disadvantage (more knowledgeable people willcorrect me wherever necessary). Software RAID function is executed by mainCPU.

Under very sophisticated system (linux kernel), as one of theprocesses (even if it is real time process), on the system that isswitching between processes. Therefore, RAID task for software RAID livesin much more dangerous environment. Now, if it never finishes (say, kernelpanics due to something else), you get inconsistent device (software RAIDone), and it is much much much harder task to bring that to to some extentconsistent state than, e.g., to bring back dirty filesystem that lives onthe sane device. This is why we still pay for hardware RAID devices. I do.Just my 2c.ValeriValeri GaltsevSr System AdministratorDepartment of Astronomy and AstrophysicsKavli Institute for Cosmological PhysicsUniversity of ChicagoPhone: 773-702-4247. GKH Valeri, I hope you realize that your arguments for hardware RAID all depend on everything working just right. If something goes wrong with a disk (on HW RAID) you can't just simply take out the disk, move it to another computer and maybe do some forensics.

The formatting of disks on HW RAID is transparent to Linux. Therefore my disks are all RAID or not. What if I wanted to mix and match? Maybe I don't want my swap RAID for performance.

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The idea of taking my data (which is controlled by an OSSat Aug 21, 2014 at 10:32 pm. Valeri,I hope you realize that your arguments for hardware RAIDall depend on everything working just right.If something goes wrong with a disk (on HW RAID)you can't just simply take out the disk, move it to anothercomputer and maybe do some forensics.The formatting of disks on HW RAID is transparent to Linux.Therefore my disks are all RAID or not.What if I wanted to mix and match? Maybe I don't want my swapRAID for performance.The idea of taking my data (which is controlled by an OSSOperating System, Linux) and putting it behind a closed sourceand closed system RAID controller is appalling to me.It comes down to this: Linux knows where and when to positionthe heads of disks in order to max performance. If aRAID controller is in the middle, whatever algorithmLinux is using is no longer valid.

The RAID controlleris the one who makes the I/O decisions.Sorry, this is not something I want to live with.GKH. On Thu, August 21, 2014 3:54 pm, Matt wrote:Hate to change the conversation here but that's why I hate hardwareRAID.I love hardware RAID. 3ware more than others. In case of hardware RAID itis tiny specialized system (firmware) that is doing RAID function. In thespecialized CPU (I should have called it differently) inside hardware RAIDcontroller. Independent on the rest of computer, and needing only power tokeep going. Tiny piece of code, very simple function.

It is really hard tointroduce bugs into these. Therefore you unlikely will have problem ondevice level. To find the status of the device and its components(physical drives) you always can use utility that comes from hardwarevendor, you can have even web interface if it is 3ware. If it was software RAID, Linux would always tell you what's going on.It does. And so does hardware RAID device. And most of them (3ware inparticular) do not do offline (i.e. Delaying boot) check/rebuild, but theydo it online (they are being operational in degraded state, and donecessary rebuild with IO present on the device, they just exportthemselves to Linux kernel with the warning of being degraded RAID duringboot).Software RAID, however, has a disadvantage (more knowledgeable people willcorrect me wherever necessary).

Software RAID function is executed by mainCPU. Under very sophisticated system (linux kernel), as one of theprocesses (even if it is real time process), on the system that isswitching between processes. Therefore, RAID task for software RAID livesin much more dangerous environment. Now, if it never finishes (say, kernelpanics due to something else), you get inconsistent device (software RAIDone), and it is much much much harder task to bring that to to some extentconsistent state than, e.g., to bring back dirty filesystem that lives onthe sane device. This is why we still pay for hardware RAID devices. I do.Just my 2c.ValeriValeri GaltsevSr System AdministratorDepartment of Astronomy and AstrophysicsKavli Institute for Cosmological PhysicsUniversity of ChicagoPhone: 773-702-4247CentOS mailing listCentOS at centos.org. Les Mikesell Yes, but try a software RAID when you have intermittently bad RAM.

I've been there. Mirrored disks that were almost, but not quite, mirrors. You can if that other computer has a matching controller. If you expect to do forensics you should have that.

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Most people would just use a backup, though. If you want performance, you'll have enough RAM that you won't ever page swap back in.

It should all be backed up. I don't think linux has ever known or cared much about disk geometry. Les Mikesell Yes, but if you fix the RAM, fsck the disk, and rewrite the data you sort of expect it to work again. In this case with the mirrors randomly mismatching but marked as good, fsck would read the good one in some spots when checking but later the system would read the bad one. In hindsight the reason is obvious but it took me a while to see why the box still crashed every few weeks. I thought this was supposed to be ECC with 1-bit correction - and I thought that was supposed to mean that if it. On Thu, Aug 21, 2014 at 6:17 PM, John R Pierce wrote:Yes, but try a software RAID when you have intermittently bad RAM.I've been there.

In hindsight the reason is obvious but it took me a while to seewhy the box still crashed every few weeks. Which, btw, is why I insist on ECC for servers.

And really prefer ZFSwhere each block of each part of a raid is checksummed and timestamped,so when scrub finds mismatching blocks, it can know which one is correct.I thought this was supposed to be ECC with 1-bit correction - and Ithought that was supposed to mean that if it couldn't correct it wouldjust stop, but it didn't. It took about 3 days of a memtest-86 run tohit the problem and show that it was RAM - and it has run for manysubsequent years since swapping it all. But, the only reason thatbox is still around is that it is an enormous tower case and the onlything I had with enough drive bays for what I was doing then. On Thu, Aug 21, 2014 at 6:17 PM, John R Pierce wrote:Yes, but try a software RAID when you have intermittently bad RAM.I've been there.

Mirrored disks that were almost, but not quite,mirrors.try any file system when you've got flakey ram. Data thats not quitewhat you wanted, oh boy.Yes, but if you fix the RAM, fsck the disk, and rewrite the data yousort of expect it to work again. In this case with the mirrorsrandomly mismatching but marked as good, fsck would read the good onein some spots when checking but later the system would read the badone. In hindsight the reason is obvious but it took me a while to seewhy the box still crashed every few weeks. Valeri Galtsev If the drive that is member of hardware RAID failed (say timed out while dealing with reallocation of badblock), it is kicked out of the RAID, I get notification by 3ware daemon, hot unplug the drive, hot plug in replacement (of same or larger size), and start rebuild RAID through firmware utility, or GUI interface, or controller starts RAID rebuild automatically if configured so. The system on the machine has no idea about all this and keeps running happily. I do no forensics on failed.

Maybe I don't want my swapRAID for performance.Speaking of swap: RAM is large and cheap these days. I do not use swap onmachines with 32 GB of RAM or larger. On multitasking system you have toswitch between processes, which is more often than every millisecond.Imagine now you need to swap in or out 32GB during some of the switchingbetween processes. Your system will be on its knees just because of that.Unless you have very special block device which is almost as fast as RAM,which you better just have added to the address space of RAM (from kernelpoint of view), so we are not speaking of these devices as of hard drives.

Code: hpsa.hpsasimplemode=1 hpsa.hpsaallowany=1After I followed the instructions mine worked. The trick, of course, is to get the INSTALL to 'see' the RAID long enough to install and add this, and that was in the discussion.Besides TrevorH's correct assessment, you may also like to know that this beast running headless and on a single power supply uses $50 USD per month and by itself heats up the entire room (all that heat is going somewhere)! I guess there's a reason they reside in air conditioned data centers of corporations with budgets for them Heh.If I stumble into the thread one day I'll pass it on. Code: dmesg less/i./bi can accept that HP needs to be paid for excellent firmware. HP should be encouraged to drop charges for firmware and Advanced iLO licensing for much older servers. I would like to see the 'Advanced iLO License' turn on automatically after X years.

The value of HP Servers dropped precipitously since they started charging for firmware. It can cost as much as a new server to get the support contract and Advanced iLO license (at least for a G6).

I am betting that the power management problems on HP Servers are due to NOT having an Advanced iLO license. Without the Advanced iLO license, one of the important things that cannot be done is power management or even accessing power consumption details. Licensing may very well be responsible for irrectractable kernel level power problems.You may want to download and install hpsum to update as much free firmware as you can now as it may bring it upto 2011 or so.