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34729 discussions

ZFS and encryption on CentOS 7
by H 23 Sep '20

23 Sep '20

Can I ask what the prevailing opinion is on ZFS and encryption on CentOS 7? Is encryption in ZFS stable? If so, I would use it on a new naked drive I just added. If not, I might stick with LUKS and XFS for now. The drive is a 2 Tb SSD. Thanks.

1 0

Forefox on C7 - uses wrong program to view download folder
by Gary Stainburn 23 Sep '20

23 Sep '20

I've got a C7 laptop using the default repo's (installed plus epel). My firefox has decided to use the wrong program to view the downloads folder. If I download and save a file, then click on the Downloads icon and click on view folder containing the file, it opens the MP3 editor EasyTag instead of Dolphin or Konquror. How do I change it back.

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A Request to Add module to CentOS Linux (3.10.0-1127.18.2.el7.x86_64) 7 (Core)
by Dedoep 22 Sep '20

22 Sep '20

Hello, Is it possible to add the mac802154_hwsim module to CentOS Linux (3.10.0-1127.18.2.el7.x86_64) 7 (Core), so that its part of the OS? Thanks Dan

5 9

iptables & voip
by Gregory P. Ennis 22 Sep '20

22 Sep '20

Everyone, I would like to use our gateway linux machine to give bandwidth preference to voip udp packets. Can anyone point me to a tutorial about the use of voip and iptables? I usually prefer to use iptables instead of firewalld. iptables is more intuitive, and easier to understand. Thanks much!!! Greg Ennis

2 1

CentOS Linux updates released (RSS Feeds)
by Johnny Hughes 21 Sep '20

21 Sep '20

As you may or may not know, we do not have the ability to currently announce CentOS Linux 8 announcements on the CentOS Annonuce Mailing List. We would like to add this in the future. For now, what we do have is an RSS feed for all updates that get released. Use your favorite RSS Feed Tool (I use Thunderbird .. lots of other things available). https://feeds.centos.org/ Subscribe to the xml file you are interested in .. for example, for normal CentOS Linux 8 x86_64 arch installs .. you would subscribe to: https://feeds.centos.org/centos-8-x86_64-BaseOS.xml https://feeds.centos.org/centos-8-x86_64-AppStream.xml This is for people who have asked about what rpms are updated and how to see when new updates happen on CentOS Linux 8. But it works for all versions of CentOS (There are xml files for all repos of CentOS Linxui 6. 7, and 8 .. Also CentOS Stream). Thanks, Johnny Hughes

2 1

CentOS 8 LSI SAS2004 Driver
by William Markuske 20 Sep '20

20 Sep '20

Hello, I've recently been given domain over a number of supermicro storage servers using Broadcom / LSI SAS2004 PCI-Express Fusion-MPT SAS-2 [Spitfire] (rev 03) to run a bunch of SSDs. I was attempting to do fresh installs of CentOS 8 and have come to find out that RedHat deprecated support for a number of HBAs for 8 including all running the SAS2004 chip. Does anyone know if there is a driver available for this chip from a third party repo? My google searches have led me to believe that EPEL 8 has a kmod-mpt3sas package but it does not seem to exist though multiple blogs have stated otherwise. If anyone knows if there is a solution for CentOS 8 that would be great or if I have to roll back to CentOS 7 for card support. Thanks, William

5 8

Drive failed in 4-drive md RAID 10
by Kenneth Porter 20 Sep '20

20 Sep '20

I got the email that a drive in my 4-drive RAID10 setup failed. What are my options? Drives are WD1000FYPS (Western Digital 1 TB 3.5" SATA). mdadm.conf: # mdadm.conf written out by anaconda MAILADDR root AUTO +imsm +1.x -all ARRAY /dev/md/root level=raid10 num-devices=4 UUID=942f512e:2db8dc6c:71667abc:daf408c3 /proc/mdstat: Personalities : [raid10] md127 : active raid10 sdf1[2](F) sdg1[3] sde1[1] sdd1[0] 1949480960 blocks super 1.2 512K chunks 2 near-copies [4/3] [UU_U] bitmap: 15/15 pages [60KB], 65536KB chunk smartctl reports this for sdf: 197 Current_Pending_Sector 0x0012 200 200 000 Old_age Always - 1 198 Offline_Uncorrectable 0x0010 200 200 000 Old_age Offline - 6 So it's got 6 bad blocks, 1 pending for remapping. Can I clear the error and rebuild? (It's not clear what commands would do that.) Or should I buy a replacement drive? I'm considering a WDS100T1R0A (2.5" 1TB red drive), which Amazon has for $135, plus the 3.5" adapter. The system serves primarily as a home mail server (it fetchmails from an outside VPS serving as my domain's MX) and archival file server.

2 4

storage for mailserver
by Michael Schumacher 20 Sep '20

20 Sep '20

hi, I am planning to replace my old CentOS 6 mail server soon. Most details are quite obvious and do not need to be changed, but the old system was running on spinning discs and this is certainly not the best option for todays mail servers. With spinning discs, HW-RAID6 was the way to go to increase reliability and speed. Today, I get the feeling, that traditional RAID is not the best option for SSDs. I am reading that all RAID members in SSD-arrays age synchronously so that the risk of a massive failure of more than one disk is more likely than with HDDs. There are many other concerns like excessive write load compared to non-raid systems, etc. Is there any common sense what disk layout should be used these days? I have been looking for some kind of master-slave system, where the (one or many) SSD is taking all writes and reads, but the slave HDD runs in parallel as a backup system like in a RAID1 system. Is there any such system? Any thoughts? best regards Michael Schumacher

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Re: [CentOS] Drive failed in 4-drive md RAID 10
by Jon Pruente 18 Sep '20

18 Sep '20

On Fri, Sep 18, 2020 at 3:20 PM Kenneth Porter <shiva(a)sewingwitch.com> wrote: > Thanks. That reminds me: If I need to replace it, is there some easy way > to > figure out which drive bay is sdf? It's an old Supermicro rack chassis > with > 6 drive bays. Perhaps a way to blink the drive light? > It's easy enough with dd. Be sure it's the drive you want to find then put dd if=/dev/sdf of=/dev/null into a shell, but don't run it. Look at the drives and hit enter and watch for which one lights up. Then ^c while watching to be sure the light turns off exactly when you hit it.

1 0

Re: [CentOS] Drive failed in 4-drive md RAID 10
by Michael Schumacher 18 Sep '20

18 Sep '20

Hi, > Thanks. That reminds me: If I need to replace it, is there some easy way to > figure out which drive bay is sdf? # smartctl -all /dev/sdf will give you the serial number if the drive. That will be printed on the disk label. But you still have to shut down your machine and pull all drives to find it. best regards --- Michael Schumacher

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