Also compression look up the mt commands. But most are on by default. Only encryption is anything you need to mess with in bareos. Again if doing client compression you won’t see much if any on the tape side. If your not you should see it.
You can verify how much compression your getting two ways. One is the volume size bareos reports being larger than the 6T native size. The other is look at the sg_* commands. One will read ann the drive and currently loaded tape data. One will tell you compression ratio read / written for the tape. Sent from my iPhone Brock Palen 989-277-6075 > On Dec 25, 2020, at 12:53 PM, Brock Palen <[email protected]> wrote: > > I wouldn’t bother. Modern LTO drives (any made in lay 10 years) auto detect > end of volume. I do t use this setting at all with my two drives and it auto > sorts it out. > > This is important because the 15T quoted assumes compression of a given > ratio. That can very drastically. If you use client side compression you > won’t see any compression at all. Similar if most your data are video and > doesn’t compress well. If it’s all text emails you will get more than listed. > > Let the drive auto detect and it will work the best. I think this is one of > the things you can test with the btape command. Highly recommend you run all > the tests in btape abd make sure they pass. > > I only use max volume size with disk volumes. > > Sent from my iPhone > Brock Palen > 989-277-6075 > >>> On Dec 25, 2020, at 12:38 PM, 'Frank Cherry' via bareos-users >>> <[email protected]> wrote: >>> >> >> Hello there, >> >> I'm storing on Ultrium 7 LTO tapes with a single drive unit. >> It is right, to set in the pool config the >> >> Maximum Volume Bytes = 15000G # Limit Volume size to something >> reasonable >> >> to 15000G ? The tape is specified with 6 / 15 TB (uncompressed / compressed) >> >> Is the tape drive works as default with compression? How can I check it and >> can I define it on the SD config? >> >> Thanks, Frank >> -- >> You received this message because you are subscribed to the Google Groups >> "bareos-users" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/bareos-users/f7fef681-396f-47dc-8a76-6a28547e7caan%40googlegroups.com. -- You received this message because you are subscribed to the Google Groups "bareos-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/bareos-users/C298FD39-68EF-4187-B61F-34F983B21018%40mlds-networks.com.
