Displaying 20 results from an estimated 52 matches for "512gb".
2015 Apr 10
4
how can I tell what's on the MBR of /dev/sda?
Subject says it.
I would like to find out if I have anything written on the MBR of a disk
in my system /dev/sda, or any other device.
If there is something there, is it readable, or recognizable to humans?
thanks,
-chuck
2018 Feb 01
3
Re-enable grub boot in UEFI (Windows took over it)
...oot0000* Windows Boot Manager HD(1,GPT,a6b87338-9b9c-4a50-8fde-2447e8fdebb6,0x800,0xfa000)/File(\EFI\Microsoft\Boot\bootmgfw.efi)WINDOWS.........x...B.C.D.O.B.J.E.C.T.=.{.9.d.e.a.8.6.2.c.-.5.c.d.d.-.4.e.7.0.-.a.c.c.1.-.f.3.2.b.3.4.4.d.4.7.9.5.}....................
Boot0001* UEFI: A400 NVMe SanDisk 512GB, Partition 1 HD(1,GPT,a6b87338-9b9c-4a50-8fde-2447e8fdebb6,0x800,0xfa000)/File(EFI\Microsoft\Boot\bootmgfw.efi)..BO
Boot0002* Diskette Drive BBS(Floppy,Diskette Drive,0x0)..BO
Boot0003* M.2 PCIe SSD BBS(HD,P0: A400 NVMe SanDisk 512GB,0x0)..BO
Boot0004* USB Storage Device BBS(USB,Kings...
2015 Apr 10
0
how can I tell what's on the MBR of /dev/sda?
...here is something there, is it readable, or recognizable to humans?
the MBR contains both binary boot code, which is not human readable, and
the master partiion table for the device. you can display the latter like...
$ sudo parted /dev/sda print
Model: ATA Crucial_CT512M55 (scsi)
Disk /dev/sda: 512GB
Sector size (logical/physical): 512B/4096B
Partition Table: msdos
Number Start End Size Type File system Flags
1 1049kB 525MB 524MB primary ext4 boot
2 525MB 512GB 512GB primary lvm
note tho, that if "Partition Table" instead say...
2012 Aug 19
2
LVM overhead? Does it cripple I/O?
For a high-performance system (64-cores, 512GB RAM, 5TB local disk, 110TB NFS-mounted storage) is there any advantage of dropping lvm and mounting partitions directly?
We're not planning on changing partition sizes, but if we did we'd probably do a full rebuild.
Has anyone done performance testing to show that lvm isn't crippling I/...
2013 Aug 19
1
LVM RAID0 and SSD discards/TRIM
...image sequences extremely non-linearly and in several passes,
using many CPUs, so the sequences get very fragmented.
The obvious solution to this seems to be to use SSDs for its output, and
some scripts that will pick up and copy our the sequences in proper
order once it's done. I have two 512GB SSDs, and I've used LVM to set up
a RAID0 between them.
I've got that part running, but since I'm on CentOS 5.8 (which is what
this application officially supports), I don't have a kernel with SSD
discard support, and after a few days (I told you, this application is
write inte...
2018 Feb 01
0
Re-enable grub boot in UEFI (Windows took over it)
...00* Windows Boot Manager HD(1,GPT,a6b87338-9b9c-4a50-8fde-2447e8fdebb6,0x800,0xfa000)/File(\EFI\Microsoft\Boot\bootmgfw.efi)WINDOWS.........x...B.C.D.O.B.J.E.C.T.=.{.9.d.e.a.8.6.2.c.-.5.c.d.d.-.4.e.7.0.-.a.c.c.1.-.f.3.2.b.3.4.4.d.4.7.9.5.}....................
> Boot0001* UEFI: A400 NVMe SanDisk 512GB, Partition 1 HD(1,GPT,a6b87338-9b9c-4a50-8fde-2447e8fdebb6,0x800,0xfa000)/File(EFI\Microsoft\Boot\bootmgfw.efi)..BO
> Boot0002* Diskette Drive BBS(Floppy,Diskette Drive,0x0)..BO
> Boot0003* M.2 PCIe SSD BBS(HD,P0: A400 NVMe SanDisk 512GB,0x0)..BO
> Boot0004* USB Storage Device...
2019 Jul 18
2
Samba async performance - bottleneck or bug?
Hi,
I have a ZFS dataset that has sync writes disabled (setting sync=disabled) which means that it will only do async writes, and sync requests get converted to async writes. The ZFS dataset is hosted on a single Samsung 840 Pro 512GB SATA SSD.
I have this same dataset served as a Samba share, using Proxmox VE 6. Samba version 4.9.5-Debian (Buster), protocol SMB3_11. Kernel version 5.0.15.
To illustrate, when I do a random sync write benchmark on the host on this dataset, it will use RAM to do the write, drastically speeding up...
2019 Oct 04
3
CentOS 8 network-scripts
On 10/4/19 11:02 AM, Ljubomir Ljubojevic wrote:
> ...
> It is OK if your KVM host is on LAN cable that never is disconnected
> or power goes down. But I have a laptop I use first at work where I
> use LAN and then at home where I use WLAN only, and suspending laptop
> is same as disconnecting LAN, bridge is disabled and KVM bridged
> network unhooked, and you can never
2016 Oct 28
4
Disk near failure
On Fri, October 28, 2016 2:42 am, Alessandro Baggi wrote:
> Il 27/10/2016 19:38, Yamaban ha scritto:
>> For my personal use I would replace that Drive asap.
>> - There is no warranty for it anymore (time since buy)
>> - You can't buy it new anymore (discontinued)
>> - There are more reliable drives available.
>>
>> I'd go for a Samsung Evo 850, that
2018 Feb 01
5
Re-enable grub boot in UEFI (Windows took over it)
Hello there,
Dell XPS-15-9560 laptop (SSD drive, UEFI, secure boot off).. Windows 10
pre-installed, CentOS7 installed in a separate partition and running
for months w/o issue. Don't know what happened but at reboot yesterday
(not even booted in Windows, just rebooted), grub has disappeared,
booted in Windows by default, which apparently has taken over the UEFI
boot.
By booting from a USB
2016 Oct 28
1
Disk near failure
...many disks fails....
>
> Now about bad hardware manufacturing companies it's another problem.
> These companies point to low cost consumer, due the fact that not anyone
> can get the best hardware due to money. An example? Corsair LE 480 GB
> (100$) vs Samsung SSD Serie 850 Pro 512GB (260$). 850 Pro is better,
> but more expensive, and Corsair LE has 3 year of warrenty. Maybe an user
> can spend his money for a vga or a better cpu. These bad companies
> permit some users to get hw for less money without a great expecation
> for cheapest use case and their ability t...
2017 Sep 08
3
cyrus spool on btrfs?
...ore without
>> trouble, though not for any heavy lifting, it's my test servers at
>> home. Without an idea of the expected mail traffic, this is all
>> speculation.
>
> The SSDs don?t need to be large, and they aren?t.? They are already
> greatly oversized at
> 512GB nominal capacity.
>
> There?s only a few hundred emails per day.? There is no special
> requirement for their
> storage, but there is a lot of free space on these SSDs, and since the
> email traffic is
> mostly read-only, it won?t wear out the SSDs.? It simply would make
> s...
2019 Oct 04
0
CentOS 8 network-scripts
...st
times (if I want) plug a LAN to my laptop and be happy. I do not use
LUKS so suspend until I get home 10 minutes later is ok.
>
> My laptop is at least as powerful as most of our servers, and it works
> great for development purposes.
I have Dell Vostro 15 with Core i7, 12GB RAM and 512GB SSD + 1TB HDD
>
> _______________________________________________
> CentOS mailing list
> CentOS at centos.org
> https://lists.centos.org/mailman/listinfo/centos
>
--
Ljubomir Ljubojevic
(Love is in the Air)
PL Computers
Serbia, Europe
StarOS, Mikrotik and CentOS/RHEL/Linux...
2019 Oct 04
1
CentOS 8 network-scripts
...terface addresses and ports to our two
26-meter radio telescopes).
> If this with NetworkManager-config-server package works, I can at most
> times (if I want) plug a LAN to my laptop and be happy.
I am interested in what you find!
> I have Dell Vostro 15 with Core i7, 12GB RAM and 512GB SSD + 1TB HDD
Dell Precision M6700 with Core i7-3740QM @ 2.7GHz, 24GB RAM, 500GB SSD
plus 2x 1TB HGST 7K1000's.? I never buy new, always gently preowned, and
it's amazing to me how well the 3740QM performs relative to newer
stuff.... and I paid less than 10% of MSRP for it....
2008 Feb 26
0
Managing page tables question
...the L4 table you would add an entry at 0xFF that points to the L4
table itself. That would automatically map all page tables into the
end of the address space (with signed addresses and xen taking up the
negative half).
Now this idea sounds interesting. You waste one entry in the L4 page
table (or 512GB of virtual address space that you will never miss) and
no pages at all. And every single page table would be at a well
defined virtual address in a 1:1 mapping to the offsets they are at.
BUT CAN YOU DO THAT IN XEN?
The L4 table is pined to PIN_L4_TABLE and each entry in the L4 table
must point t...
2016 Oct 28
0
Disk near failure
...urn all brand because many disks fails....
Now about bad hardware manufacturing companies it's another problem.
These companies point to low cost consumer, due the fact that not anyone
can get the best hardware due to money. An example? Corsair LE 480 GB
(100$) vs Samsung SSD Serie 850 Pro 512GB (260$). 850 Pro is better,
but more expensive, and Corsair LE has 3 year of warrenty. Maybe an user
can spend his money for a vga or a better cpu. These bad companies
permit some users to get hw for less money without a great expecation
for cheapest use case and their ability to pay.
Than if...
2019 Jul 19
0
Samba async performance - bottleneck or bug?
...18 Jul 2019 19:04:47 +0000, douxevip via samba wrote:
> Hi,
>
> I have a ZFS dataset that has sync writes disabled (setting sync=disabled) which means that it will only do async writes, and sync requests get converted to async writes. The ZFS dataset is hosted on a single Samsung 840 Pro 512GB SATA SSD.
> I have this same dataset served as a Samba share, using Proxmox VE 6. Samba version 4.9.5-Debian (Buster), protocol SMB3_11. Kernel version 5.0.15.
>
> To illustrate, when I do a random sync write benchmark on the host on this dataset, it will use RAM to do the write, drastica...
2019 Jul 19
3
CentOS 8 partiitioning for reliability
I was just given a Dell R720xd with 160 GB memory and 12x 900 GB drives
that I plan to deploy as my home mail/file/backup server to replace an
aging Supermicro server running CentOS 7. Yeah, it's gross overkill for
that and I expect to tuck most of the drives away for spares.
How should I RAID and partition this beast for maximum reliability?
My current C7 system is using 1 TB of 2 TB
2017 Sep 08
5
cyrus spool on btrfs?
On 09/08/2017 09:49 AM, hw wrote:
> Mark Haney wrote:
>> I hate top posting, but since you've got two items I want to comment
>> on, I'll suck it up for now.
>
> I do, too, yet sometimes it?s reasonable.? I also hate it when the lines
> are too long :)
>
I'm afraid you'll have to live with it a bit longer.? Sorry.
>> Having SSDs alone will give you
2019 Jul 19
3
Samba async performance - bottleneck or bug?
...019 19:04:47 +0000, douxevip via samba wrote:
>
> > Hi,
> > I have a ZFS dataset that has sync writes disabled (setting sync=disabled) which means that it will only do async writes, and sync requests get converted to async writes. The ZFS dataset is hosted on a single Samsung 840 Pro 512GB SATA SSD.
> > I have this same dataset served as a Samba share, using Proxmox VE 6. Samba version 4.9.5-Debian (Buster), protocol SMB3_11. Kernel version 5.0.15.
> > To illustrate, when I do a random sync write benchmark on the host on this dataset, it will use RAM to do the write, dras...