ashift is 0 but in this case I'm not rushing to recreate the pool with
ashift=12 because there's CoreStorage (logical volume management) between the pool and the disk.
I guess that if alignment is proper at the (lower) CoreStorage layer, then I can accept the default ashift 0 at the (upper) ZFS pool layer.
True?
No rush for an answer. (I don't expect other people to experiment with CoreStorage in this way.)
- Code: Select all
macbookpro08-centrim:~ gjp22$ zpool get ashift gjp22
NAME PROPERTY VALUE SOURCE
gjp22 ashift 0 default
macbookpro08-centrim:~ gjp22$ zpool list
NAME SIZE ALLOC FREE CAP HEALTH ALTROOT
gjp22 572Gi 377Gi 195Gi 65% ONLINE -
macbookpro08-centrim:~ gjp22$ zfs list
NAME USED AVAIL REFER MOUNTPOINT
gjp22 377Gi 186Gi 327Gi /Volumes/gjp22
macbookpro08-centrim:~ gjp22$ diskutil list disk2
/dev/disk2
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *616.0 GB disk2
1: EFI 209.7 MB disk2s1
2: ZFS 615.7 GB disk2s2
macbookpro08-centrim:~ gjp22$ diskutil coreStorage list
CoreStorage logical volume groups (2 found)
|
+-- Logical Volume Group 902434C9-0131-4E3A-AE15-2B8B938087AD
| =========================================================
| Name: gjp22-cs
| Size: 616336003072 B (616.3 GB)
| Free Space: 0 B (0 B)
| |
| +-< Physical Volume 179AADE6-34F1-404C-A994-9FD99C881BA6
| | ----------------------------------------------------
| | Index: 0
| | Disk: disk0s7
| | Status: Online
| | Size: 616336003072 B (616.3 GB)
| |
| +-> Logical Volume Family FFCE2FAF-BE8E-4FEF-9F3E-E221C6CBCA11
| ----------------------------------------------------------
| Encryption Status: Unlocked
| Encryption Type: AES-XTS
| Conversion Status: Complete
| Conversion Direction: -none-
| Has Encrypted Extents: Yes
| Fully Secure: Yes
| Passphrase Required: Yes
| |
| +-> Logical Volume 0CFAFD38-E79B-40AC-A4BE-63296E6B4331
| ---------------------------------------------------
| Disk: disk2
| Status: Online
| Size (Total): 616017227776 B (616.0 GB)
| Size (Converted): -none-
| Revertible: No
| LV Name: gjp22-cs
| Content Hint: Apple_HFS
|
+-- Logical Volume Group 039C0D47-F3CF-44D3-A825-B48F01FCF334
=========================================================
Name: OS
Size: 99484213248 B (99.5 GB)
Free Space: 0 B (0 B)
|
+-< Physical Volume 86D2FA98-8C69-4828-B909-8312AE4A75E2
| ----------------------------------------------------
| Index: 0
| Disk: disk0s5
| Status: Online
| Size: 99484213248 B (99.5 GB)
|
+-> Logical Volume Family 7AA96B8E-0E41-4C3F-9589-5FAE0C956372
----------------------------------------------------------
Encryption Status: Unlocked
Encryption Type: AES-XTS
Conversion Status: Complete
Conversion Direction: -none-
Has Encrypted Extents: Yes
Fully Secure: Yes
Passphrase Required: Yes
|
+-> Logical Volume B13EE5BF-5D08-49D3-94C2-DF58AFEA1D08
---------------------------------------------------
Disk: disk1
Status: Online
Size (Total): 99165437952 B (99.2 GB)
Size (Converted): -none-
Revertible: No
LV Name: OS
Volume Name: OS
Content Hint: Apple_HFS
macbookpro08-centrim:~ gjp22$