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age 35
visits member for 3 years, 7 months
seen Jan 25 at 22:54

Jan
22
comment Is it possible to change BIOS settings from Linux?
So if you are going to downvote a question ( especially after so much time ) you're really expected to leave a comment explaining why.
Jan
7
comment 3disk in raid 1 using half/half
@JimB, to what docs do you refer? md(4) clearly states that it is raid10 and the number of drives need not be a multiple of the number of replicas. Just because someone wrote on wikipedia that this is called raid 1e doesn't make it so. It is raid10 because it combines striping and mirroring, plain and simple, but whatever you want to call it ( and semantic arguments are largely pointless ) it is what the OP is looking for and claiming it isn't "standard" or "enterprise grade" is simply FUD.
Jan
7
comment 3disk in raid 1 using half/half
To read what? Your inability to provide a rational argument does not change the facts. The fact is that I'm looking at a working mdadm 3 way raid1 right now so you are incorrect.
Jan
7
comment Impact of Over Provisioning to a half used disk
@mestia, you mean like Bert's answer pointed out and I commented there that those tests are misleading?
Jan
7
comment Unidentifiable processes under Redhat Linux
ls -l /proc/7158/exe
Jan
7
comment 3disk in raid 1 using half/half
@JimB, mdadm raid10 is used by plenty of enterprises quite happily -- there is no reason at all to avoid it. Calling it "1E" is something silly that like one vendor somewhere once did. It's also kind of silly to say he did not provide raid10 when it is right there in the command.
Jan
7
comment 3disk in raid 1 using half/half
No, it does not; mdadm can do a 3 disk raid1 just fine.
Jan
7
comment dd on entire disk, but do not want empty portion
@bahamat, the question isn't asking specifically for sprase; just how to make the image take up less space.
Jan
7
comment dd on entire disk, but do not want empty portion
partimage and clonezilla are actually smart enough to skip reading the free space, rather than relying on you to write zeros to it, and then have dd or gzip drop or compress the zeros after reading them in.
Jan
7
comment dd on entire disk, but do not want empty portion
@bahamat, no, gzip is better since it will compress the data.
Jan
4
comment FTP errors due to extra slash in home path
So fix your broken script? A double slash in a posix file path is perfectly valid and treated exactly the same as a single slash.
Jan
1
comment Recovering a RAID5 with 2 disks out of the array
@user1717735, indeed, you may be able to still recover most of your data by cloning sdd using dd_rescue, but let this be a lesson to you that raid is no substitute for backups! You also need to monitor the health of the disks so you don't notice something is wrong until it is too late.
Jan
1
comment New RAID hdparm slow
That sounds like a fakeraid, in which case, you are better off using it in AHCI mode like they said works, and sticking with mdadm instead of their B.S. closed source fakeraid driver.
Jan
1
comment New RAID hdparm slow
@Alan, best test is to dd to read from the drive and write to /dev/null.
Jan
1
comment New RAID hdparm slow
Whether the vendor is willing to provide contractual support for one distro or not has no bearing at all on how well it can be expected to perform. Same kernel, same drivers, same performance can be expected.
Dec
26
comment Does an unplugged hard drive used for data archival deteriorate?
Disk drives do not periodically read and rewrite sectors on their own.
Dec
21
comment Impact of Over Provisioning to a half used disk
One needs to understand the conditions these tests were run in and how applicable they are to real life. The tests bombard the drive with writes and see how fast it can take them, and for how long. If you look at the graphs, even with no additional over provisioning, they pretty much all handle at least 30 seconds of continuous writing before slowing down at all. So unless your workload consists mostly of copying many gigabyte files to the drive from another fast ssd, you don't really need any additional sparing, certainly not 25% or more.
Dec
21
comment Impact of Over Provisioning to a half used disk
@mestia, the filesystem does not necessarily have to be full currently, only that every block in it has been written at some time in the past, and then possibly freed subsequently. Then without TRIM, the drive has to assume that all of the blocks are still in use, even if they aren't.
Dec
21
comment mount a root disk in mnt
Because an lvm physical volume is not a filesystem you can mount; you have to mount the logical volume.
Dec
21
comment mount a root disk in mnt
That won't work when the guest is using lvm