zdb doesn’t recognize my pool?
On my freenas server, zpool status tells me I have 2 zfs pool : data& freenas-boot :% zpool status pool: data state: ONLINE scan: scrub repaired 0 in 0 days 04:16:16 with 0 errors on Mon Nov 20...
View ArticleOptimal ARC and L2ARC settings for purpose specific storage application
I am configuring a server that runs 3 ZFS pools, 2 of which are rather purpose specific and I feel like the default recommendations are simply not optimized for them. Networking is facilitated by dual...
View ArticleZFS ARC ghost memory usage
Are arcstats:mru_ghost_evictable_metadata and arcstats:mfu_ghost_evictable_metadata the number of bytes stored in RAM by the arc ghost list?If so, is this memory usage also accounted for in the...
View ArticleZFS disk replacement identification?
I am still a newbie with ZFS. We had a faulty disk in a ZFS pool (using Ubuntu 22.04.2. LTS). It had been replaced automatically by a spare disk (I try to quote only the relevant parts):zpool status...
View ArticleHow I do recover from an offline, but OK drive on a ZFS mirror?
I have a ZPool consisting in two drives in a mirror configuration. It seems that during server manteinance (cleaning), one of the drives went offline because the wiring came lose.# zpool status -v...
View ArticleChange ZFS mountpoint property without remounting
I want to replace one ZFS filesystem (volume in a pool) with another ZFS filesystem (another volume in the same pool). Rebooting is okay, but I'd like to avoid single user mode.When I try to set...
View ArticleZFS pool not mounting correctly; can't find all files
I have a ZFS pool (mirrored RAID) on two disks that I've transferred from a FreeBSD 11.0 server into an Ubuntu 16.04.2 LTS server.After importing the pool, I see:NAME USED AVAIL REFER MOUNTPOINTzroot...
View ArticleHow to attach a 2-device striped mirror to a pool?
I have a single-drive pool consisting of a 2TB HDD.I have two 1TB drives I can use in mirror - I'd like to add redundancy to my pool.How can I attach these two drives as a single device so that they...
View ArticleZFS "cannot open" and "too many errors"
I got an alert this morning that one of my arrays was having a problem. I can't seem to get past it. I'm not sure how to proceed.admin@ICSSAN1:~$ zpool status -v pool: SAS_Array state: UNAVAILstatus:...
View ArticleZFS folder very slow after having many files
I am running Ubuntu 24.04 using ZFS for my filesystems. This is on a laptop whose only storage device is a WD Black SN850X NVMe card. The default Ubuntu installation process configured two ZFS pools:...
View Articlerecommendations for efficient offsite remote backup solution of vm's
I am looking for recommendations for backing up my current 6 vm's(and soon to grow to up to 20). Currently I am running a two node proxmox cluster(which is a debian base using kvm for virtualization...
View ArticleZFS backup advice with another server
I currently have two servers both have the exact same hardware, disks, etc.One server (server1) is going to be the "main" server. It's basically a server with raidz2 that has SMB shares on it that...
View ArticleZFS: resilver restarted after the scan finished
As described here I had two dead drives on my raidz2 setup. I shut down the machine, replaced one drive, then booted up. My idea was to resilver disks one by one, but the resilver process for the...
View ArticleData corruption in Windows Server VM on Proxmox
I ran into a strange data corruption issue in a VM running on Proxmox VE which I need help with. The VM in question is Windows Server 2016 Standard, used primarily as a file server.On this VM, I found...
View ArticleReplacement disk faults
I had a disk in my pool fault (raise too many errors).The number of I/O errors associated with a ZFS device exceededacceptable levels. ZFS has marked the device as faulted. impact: Fault tolerance of...
View ArticleZFS corruption, how to restore file
# zpool status -v pool: data-2024-06-04 state: ONLINE status: One or more devices has experienced an error resulting in data corruption. Applications may be affected. action: Restore the file in...
View ArticleZFS Kernel Panic Issue and Troubleshooting Steps
Experiencing kernel panic with the error message "PANIC: zfs: adding existent segment to range tree" when attempting to import the ZFS pool (rpool). The system hangs upon import attempts, making it...
View ArticleHow to set a quota on Logical Disk Space (logicalused) in ZFS?
I am currently using ZFS and need to set a quota on the logical disk space (logicalused) rather than the physical disk space used after compression. The quota and refquota properties in ZFS set a limit...
View ArticleTrueNAS Scale, pool split in two after power outage [closed]
I was using the TrueNAS with the ZimaBoard and two HDDs.Those disks were added in the Stripe pool.After the power outage the strange thing happen. Somehow the ID of the pool and one of the disks was...
View ArticleComments on new SAN for small enterprise
We currently have 4 FC arrays containing sixteen 300GB drives each in a Sun StorageTek 6140 chassis connected to an old Sun X4170 M2 server running OpenIndiana. This has been working well for the past...
View Article