HP DL360 G9 with internal SD

[DPadula]

Hi guys,

I am trying to use the internal SD card of my HP server and install proxmox on it, but the installer does not recognize the SD card as a valid disk. I tried to format the 64GB SD with a different file-system but not lucky at all.
I did a good search of this topic before post it but I haven't found anything related to installation ON usb/sd card, only installation FROM usb.

Any thought?

 

[Klaus Steinberger]

I would strongly advise against using SD-Card for system disks.

Reason: SD-Cards do not like heavy writing, they will die very early. They are just usable for setups with rare writes. At least you need to put logfiles on another medium. So why not using an adequate S-ATA SSD ? They do not cost too much ....

 

[DPadula]

I would strongly advise against using SD-Card for system disks.

Reason: SD-Cards do not like heavy writing, they will die very early. They are just usable for setups with rare writes. At least you need to put logfiles on another medium. So why not using an adequate S-ATA SSD ? They do not cost too much ....

I will check the cost of the SSD HD. But the server uses SAS HDD, not SATA.
My goal was install the proxmox on the SD card, the VMs would be one of the 2 Raid 5. So this would allow me to move VMs from one RAID to another, then destroy the RAID and replace the HDs with bigger ones as I need it without having to install the proxmox every time. Does make sense Klaus?

 

[Klaus Steinberger]

you can usually put S-ATA SSD in a SAS Shelf as long as you do not need the second channel (you do not have a second head).

Of course you could also use SAS SSD's .

Again -> keep fingers from SD Card's in a production server they are good for camera equipments but not for servers. We see also SD Cards dying frequently on Raspberry's due to writes ......

With the RAID's you can do that type of VM Movement of course.

But if you use a ZFS Z2 (or mirror) Vdev you can expand that vdev _online_ by Replacing disks one by one (and of course waiting always for the completion of the resilvering) without reinstallation. the option autoexpand must be set (it is ok when you set it before replacing last disk)

I would recommend you separating system disk(s) (a mirror would be good!) from Disk pool for VM's

one more advise from practice: never use Raid5 or Z1 with disks larger than 2 TByte (better also not with 2 TByte!) because of the long rebuild or resilver times which increase largely the risk of loosing a second disk during the rebuild/resilver. In a Raid5 or Z1 this would be fatal !!