diff --git a/README.md b/README.md
index 593dfbe..0201bb0 100644
--- a/README.md
+++ b/README.md
@@ -19,11 +19,9 @@ even if the date relies on a specific file in their repo, we can still find the
 to find repos of the mirrored projects to check, just search "projectName mirrors"
 
 not done:
-csclub
-damnsmalllinux
-debian-backports
-debian-volatile
-emacsconf
+damnsmalllinux: http://distro.ibiblio.org/damnsmall/ this project seems abandoned, candidate for brute force looping
+debian-backports: no public repo, no timestamp, no mirror tracker
+debian-volatile: no public repo, no timestamp, no mirror tracker
 linuxmint: no public repo
 linuxmint-packages pool: http://rsync-packages.linuxmint.com/pool/
 macPorts: only distfiles has public repo, no timestamp, too large to loop through
@@ -31,7 +29,7 @@ NetBSD: http://ftp.netbsd.org/pub/NetBSD/ has public repo, no timestamp, web dir
 opensuse: http://download.opensuse.org/ has public repo, a possible timestamp called latest in history, our mirror doesn't have this file tho, no mirror tracker
 puppylinux: https://distro.ibiblio.org/puppylinux/ has public repo, no timestamp, too hard to loop through, not likely to have a mirror tracker
 racket: no public repo, no timestamp, no mirror status tracker
-raspberry pi: currently no public repo, no timestamp, no mirror status tracker
+raspberry pi: https://archive.raspberrypi.org/ no timestamp, no mirror status tracker
 sagemath: don't know how to deal with this, it's a website
 salt stack: don't know how to deal with this, it's a website
 scientific: https://scientificlinux.org/downloads/sl-mirrors/ would be easy to scrape the mirror status page, except that csc is not listed here
@@ -49,6 +47,7 @@ centos
 ceph
 CPAN
 CRAN: https://cran.r-project.org/mirmon_report.html has a mirror tracker
+csclub: for now, this is the upstream itself, so it needs not to be checked
 CTAN: https://www.ctan.org/mirrors/mirmon has a mirror tracker
 Cygwin
 debian
@@ -57,6 +56,7 @@ debian-multimedia
 debian-ports
 debian-security
 eclipse
+emacsconf: for now, this is the upstream itself, so it needs not to be checked
 fedora
 freeBSD
 gentoo-distfiles